|I think you have two choices. Choice 2 is likely the best...|
Choice 1...take it apart (usually one screw hidden under a label), swish the parts around in water for a few minutes, dry it with a hair dryer (or just let it air dry) set on no heat or lo heat, put it back together, and hope for the best.
Choice 2...Drop it one more time. In the trash.
I'm not even gonna ask how this happened...
Good luck :)