No disrespect intended regarding the previous responses, but toothpaste (not gel) includes a very fine abrasive that will leave small scratches in the key surfaces. Some window cleaners include ammonia which can harm the key surfaces as well. The sweeteners used in toothpaste and the ammonia in window cleaner can harm the circuit boards inside the instrument. Specifically, if any of that liquid drips down between the keys and works its way into or under the key contacts, you will have problems. I use and suggest Cory KeyBrite. As an alternative, Key One from Music Nomad.
Bill Lewis
Senior Member
Registered: 11/12/08
Posts: 2450
Loc: Bluffton/Hilton Head SC USA
Club soda Boom !
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer