I have an ipod nano. I have an ipod nano 3rd generation 4GB. It had a waterbottle tipped over onto

Question

I have an ipod nano 3rd generation 4GB. It had a waterbottle tipped over onto it giving it a good soaking possibly over 1-2 days. I have dried it out gently over a couple of days in a warm environment. Then when I put it on to recharge I found it will connect with the computer but will not charge and the screen on the ipod doesn't light up. Should I just leave it on charge a long time or does it need a new battery or what?Thanks