Cleaning the Keys - Never use rubbing alcohol, bleach or other commercial cleaning products to clean your piano keys. Most of these products have ingredients that dry out the natural oils in your piano's ivory keys. Use a cleaning solution specially made for pianos, you can ask your dealer or piano technician for specific brands. Gently wipe the keys with a damp cloth and a little cleaning solution. You should only wipe the key tops and avoid moisture from reaching the sides of the keys. Wipe it dry immediately. In some cases, the dye used on the black keys might come off, so it is advisable to use different cloths for the white and black keys. Nowadays, real ivory is no longer widely used as it was back then. Instead, manufacturers use a special kind of plastic for the keys. You can use a damp cloth and a gentle soap to clean plastic keys.
Cleaning Ivory keys
-Immerse in water
-Scrub with a brush or even a scouring pad
-Use any chemicals whatsoever, even washing up liquid can damage the precious surface.
-Do not spray with furniture polish
-Do not use air-freshener anywhere near the keys or piano.
Generally speaking, ivory should be gently wiped with a soft clean cloth. For stubborn marks or fingerprints (it is always a good idea to wash your hands before playing the instrument) use a mild non-coloured toothpaste on a damp cloth. Ensure that you rub gently and do not scrub. Rinse with fresh milk with another lint-free cloth and buff well.
Leave the piano open on sunny days so that the keys will stay bleached and will not turn yellow. Keys that are badly discoloured or stained must be scraped and recovered by a professional piano cleaner.