Only use white toothpaste for this—gel toothpaste can hurt your ivory keys in the long run. [3] X Research source Try not to leave the toothpaste on the ivory piano keys for more than 30 seconds.
Some sources recommend cleaning ivory with lemon juice. However, lemon juice can eventually break down the ivory, which isn’t ideal. Milk, on the other hand, helps protect the ivory with calcium and other fatty acids.
Only do this once in a while. Although this can clear away pesky stains, it may also wear down the ivory.
The bacteria in the mayonnaise and yogurt actually help whiten the keys.
You only need a few drops for this—if you use too much alcohol, it’ll drip down the cracks of the instrument.
This remedy only works with ivory keys. If you have plastic keys, the sun will end up yellowing them.
Don’t use pure vinegar for this—acid can wear down the ivory over time. You can also wipe down your keys with an old T-shirt.
The washcloth should be damp, but not dripping wet. If it’s too wet, then water may drip in between the keys.
Electric or digital pianos are created with a lot of electrical components, so water isn’t a great cleaning option.
Soft cloths, like cheesecloth or flannel, are good options for this. [16] X Research source
