My iPhone went through the washer?

Last month my iPhone 4s went through the washer and just turned on and it says it's on 100 percent but when I take it off it turns completely off. And it says connect to iTunes… Can this new fixed?

Since it still turns on, you may have only ruined the battery. Try getting a new battery for your phone, and see if this fixes the problem. If it doesn't, it's most likely a lost cause and you should look into getting a new phone.

Needing to connect to iTunes means it could be asking for a reboot. It might be DFU mode. Attempt it and hope for the best. After the washer, I'm not certain. Best luck.