After you dry the iPod:
Connect the iPod to a charging source overnight and then try:
- Also try DFU mode after try recovery mode
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
If iTunses can see the iPod you can backup the iPod
http://support.apple.com/kb/HT1766and copy media from the iPod
If iTunes does not see the iPod then its contents are lost