I've used Damp-Rid that they sell in the hardware store before. I put the device (in my case it was an mp3 player that I ran with in a rainstorm) in a sealed c

I've used Damp-Rid that they sell in the hardware store before. I put the device (in my case it was an mp3 player that I ran with in a rainstorm) in a sealed container with the stuff. I left it in there for a few days and it did the job and it worked for about a year afterwards. It still does "work" but the screen is always blank now, so who knows, maybe the corrosion got to it in the end...