How do I know if my tuning pegs need replacing?

Tuning pegs fail quietly and gradually, which means most people blame everything else — strings, humidity, their own ears — before they consider the actual mechanism responsible for keeping the string at pitch.

Signs worth paying attention to

• Slipping. The string goes to pitch, then slowly drifts flat over minutes or hours with no obvious cause. This is the clearest sign of a peg that's lost its grip internally.
• Looseness or wobble. If you can feel play in the tuner itself — wiggle in the button, looseness in the shaft — the gears or bushings inside are likely worn.
• Grinding or inconsistent resistance. Smooth tuners turn smoothly. Gritty, uneven resistance suggests worn or damaged gears.
• Stripped or slipping worm gear. On the worst end, the tuner simply won't hold tension at all anymore, no matter how you adjust it.

What's not a tuner problem

Before blaming the hardware, rule out the obvious: strings that haven't been stretched in yet, a nut slot that's binding and releasing tension unevenly, or a string wrapped incorrectly around the post. New strings genuinely do need a stretch-in period, and that's not a tuner malfunction.

Replacing vs. servicing

Some tuners can be cleaned, lubricated, or have a specific worn part replaced rather than swapping the whole set. Others, especially cheaper stamped-metal tuners, aren't really designed to be serviced and are more cost-effective to replace outright — often with a real upgrade in tuning stability as a side benefit.

If you're constantly retuning and you've ruled out strings and the nut, it's worth having the tuners actually inspected rather than just living with it.