I know there are lots of articles out there on getting a keyboard clean, but I'd like to prevent my keyboard from getting nasty in the first place. The biggest problem isn't anything like food particles or liquids -- my keyboards almost instantly get a coating of finger oils and dead skin cells around the edges of the keys where my fingers rest, and the result is quite nasty. I have to clean my keyboards constantly to keep the problem in check.

I'm wondering if there are any good ways to reduce this kind of buildup on my keyboard.