I spilt water (heat protectant) on my iPhone 4S 16GB. HELP!?

I spilt water (heat protectant) on my iPhone and it keeps locking then unlocking and asking me to 'slide to turn off', I had a OtterBox over it when it got wet but I guess it only saved it a little bit. It has 2 small cracks from falling out of my pocket in basketball but I dont think those have anything to do with it. no water got in from anywhere except for probably the speakers in the middle top of the screen and the mic on top. If the ingrediants in the heat protectant matters then I can tell yall but please HELP. I Bought it in December 2011 and got it in January 2012 So the warranty probably wore off. I need a cheap way to fix it pleaseee!