Well, I have the same problem. Every time when my computer goes to sleep (i'm also using Windows 7 and RIIE) I can't wake him up again. I need to power him off and then again on. Luckily, he boots every time normaly after that... Dunno what's your problem but I think that it's not because of water on your board.

My ex-Bloodrage was completely wet because I benched outside at 5h in the morning with fog but she worked perfectly after that