Water damage to iPod touch 2nd gen?

A few months ago, it slipped bottom edge first into the sink, which was not fillled with water, but there was a thin layer of water because the faucet was running. For awhile, I could see water splotches under the screen. Now, a few months later, I found it and tried to charge it with my wall charger. When I plugged it in, the startup screen was showing for a few hours, and in the morning, the only thing that didn't work was the touch screen and the on/off button. Is there anything I can do to make if functional again? Could Best Buy possibly fix it?