Whatever method or products you use to clean or disinfect your piano keyboard, be careful not to get the cleaning product on the finish of the piano cabinet. While polyurethane-based "mirror" piano finishes are tough and resistant to damage, most will not tolerate alcohol, for example. Lacquer-based "satin" finishes are even more subject to damage by cleaning agents.
These wipes contains 70% alcohol, which if left on the keys for prolonged periods of time could cause damage. Modern key-tops are generally impervious to alcohol and alcohol works better than soap and water. However, it is not recommended that you frequently use them.
Clean a few keys at a time and then dry using a clean towel. It is often the residue or moisture that causes the damage to the keys, as it causes the wood to swell, and the key-tops to become unstuck.
Do NOT use these wipes on any of the following:
Remember: If you are unsure of what your keys are made of, please contact us prior to using a wipe or any such cleaning chemicals; firstname.lastname@example.org
Centers for Disease Control and Prevention gives, on their page Coronavirus Disease 2019 (COVID-19) > Clean & Disinfect, the following advice that can be relevant for disinfection, not considering possible harm on musical instruments:
“Current evidence suggests that novel coronavirus may remain viable for hours to days on surfaces made from a variety of materials. Cleaning of visibly dirty surfaces followed by disinfection is a best practice measure for prevention of COVID-19 and other viral respiratory illnesses in households and community settings.”
“For disinfection, diluted household bleach solutions, alcohol solutions with at least 70% alcohol, and most common EPA-registered household disinfectants should be effective.”