Whether you're caring for a guitar, mandolin, or ukulele, proper acoustic instrument maintenance is essential for longevity, playability, and tone. A well-maintained instrument not only sounds better, it also retains its value and looks beautiful for years to come.
We’ve rounded up our top 6 care tips to help you keep your acoustic instrument sounding its best. These easy-to-follow steps apply to most acoustic fretted instruments and will help you avoid the most common maintenance mistakes.
Top 6 Acoustic Instrument Maintenance Tips
1. Humidity Is the Job
More acoustic guitars are damaged by neglect of humidity than by anything else, and most of that damage is avoidable. Keep your guitar in the 45–55% relative humidity range. In a New England winter, that means an in-case humidifier (Boveda 49% packs are consistent and low-maintenance) and a hygrometer you actually check.
Room humidifiers help but can't reliably protect an instrument the way in-case humidity control can. The consequences of getting this wrong - top cracks, fret sprout, bridgeplate separation - are expensive to repair and sometimes irreversible. A $15 hygrometer and a few Boveda packs are cheap insurance.
2. Store It Right
Case closed, latched, and away from exterior walls, heating vents, and direct sunlight. If you're putting the guitar away for more than a few weeks, loosen the strings slightly - not to the point of losing all tension, just enough to take some load off the neck and bridge over an extended period.
A guitar on a wall hanger looks great until the heat kicks on directly below it. The case is almost always the right answer.
3. Know Your Finish Before You Clean It
Nitrocellulose and polyurethane finishes behave differently and react differently to cleaners and polishes - using the wrong product on a nitro finish can cause clouding or checking.
Before you reach for any polish or cleaner, know what you have. Most vintage and boutique instruments (including most of what we carry) are nitro; most factory guitars are poly. When in doubt, use a dry or barely-damp cloth and nothing else.
4. Use String Changes as an Inspection
Changing strings is the most natural opportunity to look closely at the instrument. With the strings off, check the nut slots for binding or wear, inspect the saddle for uneven grooves, look at the bridge pins and bridgeplate for stress cracks or lifting, and run a finger along the fret ends for early signs of sprout.
None of this takes long, and catching small issues early - a slightly high nut slot, a saddle that's starting to tilt - saves you from bigger problems later.
5. Learn to Read Your Neck Relief
Seasonal humidity changes move acoustic necks more than most players expect, and action that felt right in September may be noticeably different by February.
To check it, hold your guitar in playing position, fret the low E at the first and 14th frets simultaneously (14th using your right hand thumb), and look at the gap around the 7th fret - you're looking for a small amount of relief (how hight the string is sitting above the top of the fret), roughly the thickness of a business card. More than that and your action will feel stiff; less and you'll likely get fret buzz in the lower positions.
This isn't a substitute for a proper setup, but knowing how to read your neck means you're not playing a compromised instrument for months before noticing.
6. Get a Seasonal Setup - and Understand Why
Twice a year is the right cadence for most players in a climate like ours - once heading into summer humidity, once heading into winter dryness. A good setup addresses truss rod relief, saddle height, nut slot depth, and intonation as a system, not independently. The difference in feel and playability between a well set-up acoustic and one that's been ignored for two years is significant.
If you're putting serious money into an instrument, a $100 setup twice a year is part of the cost of owning it well.