My iPhone 4 got soaked, dried out, but will not power up
My iPhone 4 got completely soaked. It tried booting up when it was drying out. I didn't know the trick to forcing it to turn off. It finally turned off itself (scary). I dried it out for a couple of days (with sunlight and rice). It would not boot up. It also does not even recognize with it's plugged into the computer to charge. I changed out the battery, but it still does nothing. What should be my next step?