sansa fuze got wet/ frozen screen

I dropped mine in fresh water , not salt and it did about the same thing.  after a day it works again except that I hear static especially when the song has a lot of bass. Some songs that have not much bass sound ok, it may also have to do with the quality of the file. Im going to try loading some new stuff and see how it plays.  I have a feeling something shorted out.  I wouldnt get my hopes up if Id dropped it in the ocean. Salt water corrodes ships,  Imagine what it does to electronics.