Our keyboard is a gross pile of chips, cat hair and coffee spills topped by a neatly organized layer of buttons. We could use the Sucky Ducky.
Plug him into your USB and a simple on/off switch toggles moderate suction power. The naturally slim bill shape makes for an easy fit between the keys, as if God intended ducks to one day suck crap out of your keyboard. About $12 if you can translate your way through the site.