Julia there are lots of answers on here regarding water submersion etc. The way I start with mine is to open it up and of course check for obvious damage and I always replace the battery first. I did found that the LiIon batteries really do not like water and do react with it. Once the battery is changed and no obvious damage, try to turn it on. Try the reset
1. Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
2. Press and hold the Play/Pause and Menu buttons simultaneously until the Apple/iPod logo appears, about 6 to 8 seconds. You may need to repeat this step.
and of course try the Apple 5r's http://www.apple.com/support/ipod/five_r...
let us know how it is progressing and hopefully we can all help you out with this. Good luck