Hi there,

From you say I guess that you mean "feels sticky to the touch". In that situation I would just use a damp cloth soaked in water, and wrung out..........no excess fluid to carry whatever it is down to the membrane, or you are likely to fetch up with sticky keys.

5 year old? I would guess something sugar based, and that will dissolve in water better than a solvent.

If you look at the manufacturer's instructions I would bet that it tells you to use a soft damp cloth

It is really only when you have spilled fluids into the machine, that you need to think about anything else

I have a few keyboards that are "spill proof".....like you just flush them through..............I even have one that is supposed to be dishwasher proof, and anti-bacterial as well.

Obviously not so easy with a built in keyboard, so I would start with what is usually recommended, and maybe repeat it a couple of times.