How can i fix my LG KP501 cookie bottom keys?

I accidently dropped my phone in my cup of tea! i got it out quickly and dried it off. the battery still works and my simm card, but the bottom 3 keys don't seem to be working. I can text and make a call, but can't end a call as the keys don't work and I have to take out the battery all the time! Can I get it fixed or do I need to just replace it? Please help!!!