Yeah dude, ummmmm as long as it's still working try and open it up, and then get a non fibred cloth and some pure alcohol, dilute it with warm water and very delicately try and wipe it up. Obviously unplug everything, don't wet the cloth too much. And just be gentle. If it is a reeeeeeally small amount of coke, then just let it dry out in the sun or a hot water cupboard!
Hope that helps
Green
EDIT: Also for the really hard to reach spots get some cotton buds that you use to clean your ears and dip them lightly into some acohol, methelated spirits or whatever else like that. Make sure you dry it after cleaning it aswell, as to not leave any residue behind.