the best thing to do is to ask for isopropanol in a drugstore/pharmacy, high-percentage (>70%) even cleans the paint off, depending on the coating and time - the best thing to do is to try it out briefly and dilute it with a little water if necessary - but I've never had any problems with keyboards.

ps: to avoid stains on delicate surfaces, do not spray directly but use a cloth/brush/flat stick/etc & do not use on steel/iron.