Why Won't My Guitar Stay in Tune? 15 Common Causes & How to Fix Them

Quick Answer

A guitar that drifts out of tune every few minutes is one of the most frustrating problems an instrument can have.

The good news is that it is almost always something you can identify and correct.

Worn strings and incorrect installation are common causes, but they are far from the only ones. A guitar that will not hold pitch may also be affected by the nut, the bridge, a tremolo system, string trees, the tuning machines, the setup, temperature changes, your fretting hand, or simply the wrong set of strings for the tuning you are using.

Here is the short version of where to look first:

Symptom	Most likely place to start
Goes flat constantly right after a restring	Strings have not been stretched in
One string goes out, the rest hold	Nut slot binding, or that string is seated badly
Goes sharp after bending	Nut or string tree friction
Everything goes out after one bend or trem dive	Tremolo system, nut or string trees
In tune open, out of tune up the neck	Intonation, not tuning stability
Chords sound sharp, open strings fine	Fretting pressure or action height
Drifts over a whole rehearsal	Temperature, humidity, or strings at end of life

In this guide we will go through each cause, how to tell whether it applies to your guitar, and what to do about it. The order below is roughly the order we would check things ourselves, starting with what is cheapest and easiest to rule out.

If you want background on strings themselves while you work through this, our guides on How Often Should You Change Guitar Strings? and Guitar String Construction Explained cover how strings age and how they are built.

Common Signs Your Guitar Has a Tuning Problem

Not every tuning complaint has the same cause, and the specific symptom narrows things down quickly.

Look for which of these matches your guitar:

One string goes out of tune while the others stay put.
The guitar will not settle after a restring.
A string goes sharp after you bend it and stays sharp.
A string goes flat after you bend it and stays flat.
You hear a small ping or click from the nut area while tuning.
The whole guitar goes out after using the tremolo arm.
Open strings read in tune but fretted chords sound sharp.
The guitar is in tune in the first position but not at the twelfth fret.
Tuning shifts after the guitar moves between a cold car and a warm room.
The guitar slowly drifts flat across a rehearsal.

Two of those are worth separating out right away. If open strings are in tune but notes up the neck are not, that is an intonation problem rather than a stability problem, and we cover it below. If fretted chords sound sharp while open strings are fine, look at fretting pressure and action before anything else.

Before You Start Replacing Parts

If your guitar has suddenly started going out of tune, resist the urge to order new tuning machines.

In our experience the cause is usually something that costs little or nothing to fix. A fresh set of correctly installed strings, a nut slot that has been cleaned up, or a setup adjustment solves a large share of the tuning complaints we hear about.

Hardware does fail, and we cover that below. It is just rarely the first thing worth suspecting.

One question is worth asking before you touch anything: when did the problem start? A guitar that held pitch for years and then suddenly stopped usually points to a recent change. New strings, a weather swing, a drop or knock, a different tuning, or a setup that has come due. A guitar that has never held pitch well points more toward the nut, the setup, or a mismatch between the strings and the tuning.

Why We Started Making Strings

This question is the reason our company exists.

S.I.T. stands for Stay In Tune. Virgil Lay was a guitar repairman in Akron, Ohio who kept seeing the same complaint come across his bench: guitars that would not hold pitch, on instruments that were otherwise in good order. Rather than accept that as normal, he set out to solve it at the string itself.

The result was our Stay In Tune process. He began applying it to other companies' strings in 1978, and by 1980 was making his own. They were sold as the first strings guaranteed to stay in tune.

We mention this because it shapes how we look at the problem. A string is one part of a system, and a system has a lot of places it can let go. The rest of this guide covers the others.

Cause #1: Worn Strings

The first thing we would check is also the easiest to rule out.

As strings age they take on sweat, skin oils and dirt, corrosion builds, and the windings develop flattened spots where they meet the frets. Those irregularities affect how consistently a string vibrates and how reliably it returns to pitch after being bent or pushed. We would not put that on a timetable against when a set starts sounding dull, since the two do not track each other reliably. What is fair to say is that worn strings are cheap to rule out and worth ruling out early.

Signs the strings are the problem:

The guitar needs tuning between songs when it used to hold.
One string, often a wound one, drifts more than the rest.
Harmonics at the twelfth fret have gone indistinct.
There is visible discoloration or pitting under the strings where they cross the frets.
The strings feel rough or gritty under a sliding finger.

If you have been on the same set for a while and several of these apply, put on a fresh set before investigating anything more involved. It is the cheapest test available and it rules out a large category of problems at once.

Our How Often Should You Change Guitar Strings? guide covers how to judge string age by observable signs rather than by a fixed schedule. If corrosion is the recurring issue for you, Coated vs Uncoated Guitar Strings is worth reading, and our CRT Coated Nickel electric sets and CRT Coated Phosphor Bronze acoustic sets add corrosion resistance to extend usable life.

Cause #2: New Strings Have Not Been Stretched In

Brand new strings cause as many tuning complaints as worn ones.

Every new string settles when it first comes up to tension. Wraps tighten around the post, the string seats at the nut and saddle, and the string itself takes up a small amount of initial stretch. Until that is done, the string keeps losing tension and falling flat.

This is normal and it is not a fault in the strings.

The fix is to do that settling deliberately instead of letting it happen during your first rehearsal. After installing each string:

Bring it up to pitch.
Lift the string gently away from the fretboard at several points along its length.
Tune it back to pitch.
Repeat until it comes back to pitch on its own.

There is no need to pull hard. A firm lift is enough, and yanking a plain high E is a good way to break it. Two or three gentle passes per string is usually all it takes.

Plain strings tend to settle faster than wound ones. If one string is still dropping after the others have stabilized, check how it is wound at the post before assuming it needs more stretching.

Cause #3: The Strings Are Not Installed Correctly

Good strings cannot hold pitch if the install is working against them.

The usual culprit is how the string is wound around the tuning post. Too few wraps and the string can slip at the post. Too many, or wraps that cross over each other, and the string shifts as tension changes.

What we would aim for: the string winds neatly down the post, each wrap sitting below the one before it, without overlapping. Two to three wraps on wound strings and three to four on plain strings is a reasonable target. The downward winding also helps create a clean break angle over the nut.

Other installation mistakes that cost tuning stability:

Wraps that cross over each other on the post.
Leaving too much slack before winding, which produces a messy pile of wraps.
The ball end not fully seated against the bridge or through the body.
On acoustics, a bridge pin that has not pulled down fully and lets the ball end creep.
The string not sitting cleanly down in its nut slot.
Cutting the string too short before it is wound.

If your guitar held pitch fine until you changed strings and now will not, the install is the first place to look. Our How to Restring an Acoustic Guitar guide walks through the process step by step, and most of the principles carry over to electric.

Cause #4: The Nut Is Binding

The nut is the mechanical cause we end up pointing people toward most often, and it matters more on guitar than on bass because guitarists bend strings.

Every time you bend a note, use a tremolo arm, or turn a tuner, the string has to slide through its nut slot. If that slot is too narrow, rough, dirty, or cut at the wrong angle, the string catches instead of sliding. Tension builds on one side of the nut until it releases all at once.

That is what produces the classic symptoms:

A ping or click from the nut while you are tuning.
Tuning that jumps rather than moving smoothly as you turn the tuner.
A string that goes sharp after a bend and stays there.
A string that goes flat after a trem dive and stays there.
The G string in particular refusing to behave, since it is often the widest plain string and sits in a slot that has to accommodate it.

A quick test: tune the string to pitch, bend it a full step, release, and check the tuner. Then push down behind the nut with your thumb and check again. If the pitch jumps when you do that, the string was hung up at the nut.

Nut slots are precision work and it is easy to make a slot worse by filing it yourself. Cleaning built up grime out of the slot is reasonable. A small amount of lubricant made for guitar nuts can help. If the slot is cut too narrow or at the wrong angle, that is a job for a qualified technician, and it is usually not an expensive one.

Cause #5: String Trees and Break Angle

This one is specific to guitars with flat headstocks, and it is a close relative of the nut problem.

String trees hold the plain strings down to maintain enough break angle over the nut. They also add a second friction point that the string has to slide through. A tree that is dirty, worn into a groove, or screwed down too tight will catch the string the same way a tight nut slot does.

If your high E and B go sharp after bends while the wound strings behave, check the tree before you blame the nut.

On angled headstocks there is no tree, but the break angle over the nut can still be steep enough to create friction. The test is the same: bend, release, and see whether the pitch comes back.

Cause #6: Tremolo and Vibrato Systems

A tremolo system is a balance between string tension pulling one way and springs pulling the other. Anything that disturbs that balance moves the pitch of every string at once.

That is why a guitar with a trem can feel so much less stable than one with a fixed bridge. It is not necessarily a fault. It is the system working as designed, with more places for friction to interfere.

Common trem-related causes:

Friction at the nut or string trees, which prevents the system returning to its resting point after you use the arm.
Knife edges or pivot posts worn on a floating bridge.
Spring tension not balanced against the current string gauge and tuning.
On a locking system, nut clamps or saddle blocks that are not fully tightened.
Strings that have not been stretched in, which matters more on a floating trem than on a fixed bridge.

Two things worth knowing. First, on a floating trem, changing the tuning of one string changes the tension on all of them, so tuning up takes several passes around the strings before everything settles. That is normal. Second, changing string gauge on a floating trem almost always means the spring tension needs adjusting to match, or the bridge will sit at a different angle and the guitar will fight you.

If you have a locking tremolo and the guitar still drifts, check the fine tuners are not bottomed out and that the locking nut is clamped evenly before looking further.

Cause #7: The Ball End Is Slipping or Seated Badly

The string has to be anchored as firmly at the bridge as it is at the post.

On an electric, check that the ball end is seated against whatever it anchors to on your guitar, whether that is the bridge itself, a tailpiece, or a string-through-body ferrule, and that it has not caught on the edge of the ferrule on the way through. On an acoustic, check that the bridge pin is seated and that the ball end is pulled up against the bridge plate underneath rather than sitting partway down the hole. A ball end that has not seated will creep under tension and the string will keep going flat even though everything else is correct.

A string that goes flat steadily, always in the same direction, and keeps doing it after the set should have settled in, is worth checking here.

Cause #8: The Wrong Gauge for Your Tuning

Gauge does not cause tuning instability on its own. The mismatch between gauge and tuning can.

When you tune a string below standard pitch, its tension drops. A set that feels right in standard can feel slack in drop D and genuinely loose in drop C or lower. A slack string moves more under a pick and is more easily pushed sharp by fretting pressure, which reads as the guitar not holding pitch even when nothing is slipping.

Going heavier at a lower pitch restores tension toward where the guitar was set up to sit. That is the defensible version of the heavier-gauge argument, and it is why light top, heavy bottom sets exist.

From our electric line, the relevant sets are Power Wound Nickel .010–.052 (S1052 Heavy Bottom) and .011–.056 (S1156 Heavier Bottom). Both keep a standard or near standard top for bending while adding mass underneath. S1048 Light Plus and S1052 share the same .010 .013 .017 top three strings, so moving between them changes only the wound strings.

For baritone scale instruments and deeper tunings, SB1358 Baritone (.013–.058) and S1362 Baritone Custom (.013–.062) are built for it.

If you have recently changed gauge and the guitar has become unstable, the strings may not be the problem. The guitar may need a setup for the new tension, which is the next section.

Does a Heavier Gauge Stay in Tune Better?

Not as a rule, and it is worth being clear about this because it is a common assumption.

Gauge, tension, material and construction are separate variables. When pitch, scale length and construction are all held constant, increasing the gauge increases tension. That part is real physics. Change the construction as well, though, and the comparison stops being clean: two strings of the same diameter can carry different tension depending on how they are built.

What does not follow is that more tension means better tuning stability. Stability is governed by whether the string can slip or bind anywhere in the system, and by whether the instrument is set up for the strings on it. A heavy set on a guitar with a binding nut will not hold pitch. A light set on a well set up guitar with clean nut slots will.

We would not reduce this to a rule that heavier is always more stable. What is fair to say is narrower: if you are tuning down and the strings feel slack, going heavier restores tension toward normal, and that can fix problems that were caused by slackness specifically.

Experience level does not determine the right gauge either. Choose by the tuning you use, the feel you want under your hand, and what the guitar is set up for.

Cause #9: The Guitar Needs a Setup

Correct strings, correctly installed, still will not hold pitch on a guitar that is overdue for adjustment.

A setup brings the parts back into agreement with each other. Humidity, temperature, a gauge change or a tuning change all shift what the instrument needs.

A setup usually covers:

Neck relief
Action height
Intonation
Nut slot depth and width
Bridge and saddle adjustment
Tremolo spring balance where applicable
Pickup height when needed
Neck joint bolts or heel fit, if the neck has shifted

It is worth separating two things that get confused. Intonation and tuning stability are not the same problem. A guitar with poor intonation can be perfectly stable: the open strings read in tune, they stay in tune, and notes up the neck are still sharp or flat. That is a saddle position issue, not a slipping issue. If your tuner says every open string is right but chords at the fifth and seventh frets sound wrong, intonation is where to look, and no amount of new strings will fix it.

Cause #10: Fretting Pressure and Action Height

This one catches people out because the guitar is not actually going out of tune.

Pressing a string down to the fret stretches it slightly, which raises its pitch. The higher the action, the further the string has to travel, and the more the pitch rises. Press harder than you need to and it rises further still.

The result is a guitar where open strings read perfectly on a tuner but barre chords sound sharp, and it is most noticeable in the first few frets where players tend to squeeze hardest.

How to tell: fret a note normally and watch the tuner, then fret the same note with the lightest pressure that still produces a clean tone. If the reading drops noticeably between the two, you are pushing the note sharp.

The fix is some combination of lighter fretting technique, lower action, and nut slots that are not cut too high. Slots that are too high are a frequent cause, and they exaggerate the problem exactly where it is most audible, in open position.

A capo does the same thing. Clamp it harder than necessary, or place it too far behind the fret, and it pulls the strings sharp.

Cause #11: Temperature and Humidity

Wood moves as conditions change, and when the neck moves, string tension moves with it.

Expect to retune more often around:

Winter heating season, when indoor air dries out
Humid summer months
Outdoor shows
Air travel
Any trip between a cold vehicle and a warm room

If the guitar has been in a cold car, let it come up to room temperature in its case before tuning it. Tuning a cold guitar and then playing it warm means tuning it twice. The same applies going from an air conditioned green room onto a hot stage.

Acoustic guitars react more than solid body electrics, since there is more wood and it is thinner. Small adjustments through the year are a normal part of owning one and do not indicate a fault.

Cause #12: Tuning Machines

Tuners get blamed first and are usually innocent.

Modern tuning machines are reliable and outright mechanical failure is uncommon. When they do contribute, it is usually something simple:

Loose mounting screws on the back of the headstock
A loose bushing or hex nut on the face of the headstock
A bent post from a knock
Worn gears with noticeable backlash

Check the hardware is snug and that each tuner turns smoothly without free play before replacing anything. Slightly loose hardware mimics a slipping tuner convincingly.

Locking tuners reduce the number of wraps at the post and remove one place a string can slip, which is genuinely useful on a guitar with a tremolo. They do not address friction at the nut, so they are not a fix for a binding nut slot.

Cause #13: Bridge and Saddle Issues

Less common than the nut, but worth checking.

Things to look for:

Loose saddle height or intonation screws
Saddles shifting under heavy picking
A saddle slot that has worn a groove and is catching the string
Dirt or corrosion stopping a string seating cleanly
On acoustics, a saddle that is not sitting flat in its slot

When you restring, it is worth setting clean witness points at both ends. With the string near pitch, press gently on it just in front of the saddle and just behind the nut. This helps the string seat at its contact points rather than holding a slight bend through them, which improves both stability and intonation consistency.

Cause #14: Playing Style

Technique affects how often you need to touch the tuners.

Heavy picking, aggressive bending, wide vibrato and hard strumming all put more stress on the strings and on every contact point in the system. A player with a heavy right hand will check tuning more often than one with a light touch, on the same guitar with the same strings.

This is not an argument for playing differently. It is a reason to check tuning between songs rather than assuming something is broken.

Behind-the-nut bends and heavy use of a vibrato arm are worth calling out specifically, since both deliberately drag the string across its friction points. Both are much happier on a guitar with clean nut slots.

Cause #15: Several Small Issues at Once

Tuning problems often do not have a single cause.

A guitar might have strings near the end of their life, a nut slot that has started to catch, a setup that is a season overdue, and a weather change all at the same time. Individually none of those would be dramatic. Together they produce a guitar that feels impossible to keep in tune.

This is why fixing one thing sometimes helps without solving the problem, and why it is worth working through the list rather than stopping at the first thing you find.

How to Diagnose a Guitar That Will Not Stay in Tune

Work through these in order. Each step is cheaper or easier than the one after it.

Establish when it started. A sudden change points to a recent cause. A guitar that has never held pitch points to the nut or the setup.
Check the strings. If they are worn, corroded or past their usual life, change them before going further. This rules out a whole category at once.
Stretch the strings in properly. If the set is new, do this before concluding anything else is wrong.
Inspect the install. Look at the wraps on each post, and confirm every ball end is seated at the bridge.
Test the nut. Bend each string a full step, release, and check whether it returns to pitch. Listen for pings while tuning.
Check string trees if the guitar has a flat headstock and the plain strings are the ones misbehaving.
Check the tremolo if fitted. Confirm spring balance suits the current gauge and tuning, and that locking hardware is tight.
Separate intonation from stability. If open strings hold but fretted notes are wrong, the problem is intonation.
Check fretting pressure and action. If chords sound sharp while open strings read correctly, start here.
Confirm gauge suits the tuning. If you tune down and the strings feel slack, consider a heavier bottom end.
Check the hardware. Tighten tuner screws and bushings, and inspect saddles for loose screws or wear.
Book a setup if the guitar is overdue, if you have changed gauge or tuning, or if the nut needs attention.

Our Guitar String Options

If you have worked through the list and concluded a fresh set is where to start, here is where our lines sit.

Power Wound Nickel Electric
Nickel-plated steel wrap over a high carbon steel hex core. Twenty-six sets, from .008–.038 up to .013–.056, plus baritone, 7-string, 8-string and 12-string sets.
Good starting point for: standard tuning on most electrics. We would point first-timers at .010–.046 (S1046 Light), or .009–.042 (S942 Extra Light) if you bend a lot.

Power Wound Nickel light top, heavy bottom sets
.010–.052 (S1052 Heavy Bottom) and .011–.056 (S1156 Heavier Bottom).
Good starting point for: drop tunings where the low strings have gone slack but you want the top strings to stay bendable.

Power Groove Pure Nickel
Pure nickel wrap, warmer and more vintage in character than our nickel-plated sets.
Good starting point for: players who find plated strings too bright.

Power Steel Stainless
Stainless steel wrap, brighter with more attack.
Good starting point for: players who want more cut, and anyone whose hands eat through plated strings quickly.

CRT Coated Nickel
Our Power Wound Nickel construction with corrosion resistance added.
Good starting point for: players whose strings corrode fast, or anyone who wants longer usable life from a set.

Universals Balanced Tension
Gauged for an even feel across the set rather than following conventional gauge steps.
Good starting point for: players who find one or two strings in a normal set feel noticeably stiffer or looser than the rest.

Phosphor Bronze, Golden Bronze 80/20 and Royal Bronze
Our acoustic lines. Phosphor Bronze is the warm, balanced standard. Golden Bronze uses an 80/20 copper and zinc wrap and is brighter and crisper. Royal Bronze is phosphor bronze too, in the same gauges as our standard line, but Fusion Wound: the wrap is bonded to the core rather than simply wound onto it, which makes for a fuller, more even and longer-lasting string.
Good starting point for: acoustic players. Start with Phosphor Bronze if you are unsure. Our Phosphor Bronze vs 80/20 Bronze guide covers how those two alloys differ, and Royal Bronze swaps in at the same gauges without changing your setup.

If a single string is giving you trouble and the rest of the set is still good, our Electric Guitar Singles and Acoustic Guitar Singles let you replace just that one.

One set worth knowing about if you suspect the G string: S1150 Medium Light ships with both a wound .020 and a plain .018 third string, so you can set the guitar up either way without buying two sets. A plain third bends more easily. A wound third sounds fuller and tends to intonate more evenly.

What We See As String Manufacturers

We have been making strings in Akron since 1980, and the pattern we see in tuning complaints has not changed much.

The guitar is almost never short of good hardware. It is short of agreement between its parts. Old strings on a guitar that needs a setup, a nut cut slightly too tight, a gauge that no longer matches the tuning the player has moved to. Any one of those is survivable. Stacked up, they make a good instrument feel unreliable.

The other thing we notice is how often the fix is free. Stretching a new set in properly, winding the posts neatly, seating the ball ends, letting a cold guitar warm up before tuning it. None of that costs anything, and between them they account for a large share of the complaints that start with someone shopping for new tuners.

A string can only do its part. Our job is to make sure it does not slip or go dead early. The rest of the system has to hold up its end.

Final Thoughts

A guitar that will not stay in tune feels like a problem with the instrument. Usually it is a problem with one small part of the chain between the ball end and the tuning post.

Work through it in order rather than replacing parts and hoping. Change the strings, stretch them in, check the install, test the nut, separate intonation from stability, and confirm the gauge matches the tuning you actually play in. By the time you have done that, most guitars have told you what was wrong.

If you get to the end of the list and the guitar still fights you, that is the point to hand it to a technician. A setup with attention to the nut is not an expensive job, and it fixes a category of problem that no string change will.

Frequently Asked Questions

Why won't my guitar stay in tune after changing strings?

New strings settle as they come up to tension, and until that is finished they keep going flat. Stretch each string gently and retune it several times after installation. If one string keeps dropping after the others have stabilized, check how it is wound at the post and whether the ball end is seated at the bridge.

Why does only my G string go out of tune?

On a guitar with a plain third string, the G is the widest unwound string and it sits in a nut slot that has to accommodate that width. If the slot is slightly tight or rough, the G is the string most likely to catch. Bend it a full step, release, and see whether it returns to pitch. If it does not, the nut is the place to look.

Why does my guitar go sharp after I bend a string?

That pattern points to friction. The string slid through the nut or a string tree during the bend and did not slide back afterward, leaving extra tension on the playing side. Clean nut slots, a lubricant made for guitar nuts, or having the slots properly cut will usually resolve it.

Do heavier gauge strings stay in tune better?

Not as a rule. When pitch, scale length and construction are all held constant, a heavier string carries more tension, but tuning stability depends on whether the string can bind or slip anywhere in the system and on whether the guitar is set up for the strings fitted. Going heavier helps specifically when you have tuned down and the strings have become slack. It will not fix a binding nut slot or a loose saddle.

Can old strings cause tuning problems?

Yes. Worn strings develop corrosion, flattened windings and other irregularities that affect how consistently they vibrate and return to pitch. If a set is visibly worn or no longer responding the way it did, replacing it is a sensible first step before investigating anything more involved.

My open strings are in tune but chords sound sharp. What is wrong?

You are most likely pushing the notes sharp with your fretting hand. Pressing a string to the fret stretches it slightly and raises its pitch, and high action or nut slots cut too high make this worse. Try fretting with the lightest pressure that gives a clean note and watch what the tuner does.

My guitar is in tune in open position but not at the twelfth fret. Is that a tuning problem?

No, that is intonation. Tuning stability is about whether the guitar holds the pitch you set. Intonation is about whether fretted notes are in tune relative to the open string, and it is adjusted at the saddle. New strings will not fix it.

Why does my guitar go out of tune when I use the tremolo arm?

A tremolo balances string tension against spring tension, and the whole system has to return to the same resting point after you use the arm. Friction at the nut or string trees is the usual thing preventing that. Worn pivot points and spring tension that no longer matches the string gauge are also worth checking.

Do locking tuners fix tuning problems?

They remove one failure point by eliminating wraps at the post, which is useful on a guitar with a tremolo. They do nothing about friction at the nut, so they will not fix a guitar whose problem is a binding nut slot.

Should I tune up to pitch or down to pitch?

Tune up to the note. If you overshoot, drop below the pitch and come back up to it. Approaching from below takes slack out of the system and tends to leave the string sitting more consistently.

Can weather really affect my guitar's tuning?

Yes. Temperature and humidity change the wood, which changes neck relief and string tension. Acoustic guitars react more than solid body electrics. Let a cold guitar reach room temperature before tuning it.

Does changing string gauge mean I need a setup?

Often, yes. A different gauge changes the tension on the neck, which affects relief, action and intonation. On a floating tremolo it also changes the spring balance. The guitar may play acceptably without adjustment, but it will play better with it.

Can a capo make my guitar sound out of tune?

Yes. A capo clamped too hard, or placed too far behind the fret, pulls the strings sharp in the same way heavy fretting does. Position it just behind the fret and use the least tension that stops buzzing.

Should I replace one string or the whole set?

If a string breaks soon after a fresh set went on, replacing that one is reasonable, and we sell singles for exactly that. If the rest of the set is already worn, a full set will give you more consistent tone and feel.

Can the bridge cause tuning problems?

It can, though less often than the nut. Look for loose saddle screws, saddles shifting under heavy picking, a saddle slot worn into a groove that catches the string, or a ball end that has not seated properly.

Do tuning machines wear out?

They can, but outright failure is uncommon. Loose mounting screws, a loose bushing or a bent post are more likely than worn gears. Check the hardware is snug before replacing anything, since loose hardware feels exactly like a slipping tuner.

Is it normal to retune during a gig?

Yes. Stage temperature, hard playing and normal string settling all move pitch slightly over a set. Checking tuning between songs is routine, not a sign that something is wrong.

My 12-string will not stay in tune. Is that different?

The causes are the same, there are simply twice as many places for them to occur: twelve tuning posts, twelve nut slots and twelve ball ends to check rather than six. The paired courses are what make it feel harder, since the thin octave strings in the lower courses show up small amounts of friction quickly and both strings in a course have to agree before the course sounds in tune. Work through the same list string by string, and expect a new set to take longer to settle.

Should I lubricate the nut?

A lubricant made for guitar nuts can reduce friction and is worth trying. If the slot is cut too narrow or at the wrong angle, lubricant only postpones the problem, and the slot needs proper attention.