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Six acoustic piano-care steps: clean keys, humidity and tuning

Wipe keys gently without alcohol, keep room humidity stable, and arrange regular professional tuning.

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Wikimedia Commons · Peaceinpianos / Wikimedia Commons (CC BY-SA 4.0) · CC BY-SA 4.0 ↗

Yamaha's acoustic piano guidance recommends separate soft cloths for keys and finish, avoidance of unsuitable cleaners and alcohol, and protection from humidity fluctuations, heat and sunlight. Model-specific finishes and manuals take precedence. Digital pianos need different care.

Your try-it-at-home checklist

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1. Confirm this is an acoustic upright or grand piano and check the manufacturer's finish and key-material guidance. Do not assume the same procedure applies to digital models.
2. Play with clean hands. Gently wipe keys with a soft lint-free cloth, using separate cloths for keys and the polished cabinet.
3. For visible grime, follow the maker's directions: use a well-wrung cloth moistened with diluted neutral detergent. Never pour or spray liquid into key gaps.
4. Yamaha warns against alcohol on acoustic piano keys. Avoid general chemical wipes and arbitrary waxes or polishes on the finish.
5. Monitor room humidity and avoid sudden changes. Yamaha's care guidance gives around 35–55% relative humidity as a reference; keep the piano away from direct sunlight, radiators and strong air-conditioning drafts.
6. If keys stick, the tone changes or the piano loses tuning, consult a qualified piano technician rather than opening the action. Yamaha recommends professional tuning at least annually.

Yamaha CorporationCare and Maintenance of a Piano: Care You Can Do at Home ↗Original Yamaha instrument guide: soft separate cloths, neutral detergent on well-wrung cloth if needed, no alcohol or inappropriate chemical wipes, finish-specific care.Yamaha Music USAFive Simple Steps for Maintaining Your Piano ↗Original official Yamaha advice: steady 35–55% room humidity with 45% as reference, avoid direct heat and drafts, seek professional care.Yamaha Corporationピアノのお手入れ:年に１度は調律を ↗Original Japanese Yamaha article: acoustic piano tuning at least yearly by an expert; technician rather than owner adjusts mechanism.

Your try-it-at-home checklist

Further reading

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