Soap and water... The way I klean my keyboard is disassembling it... you can try by taking out one letter at a time esc for example and give it a try... whith a steel or metal ruler or a small screwdriver will do and putting it back just with a little pressure the only tricky ones are: Return space and backspace you wil find a small wire that is attached to the keyboard but it will be no problem for you you can clean these keys with a q-tip just moitened...