They have wipes that you can use to clean your keyboard and monitor. You can find them at computer stores or sometimes in the computer section of office supply or super stores.
I also wouldn't let him eat or drink around the computer. Although I've been drunk and eaten many a greasy, sweet, sticky foods and I've never had a sticky keyboard...it just wasn't as white as it should be.
The guys in here may sound gross to you...but remember they are the sticky boys.
Wouldn't want them any other way.