when i first got my iphone 4 2 years ago I dropped it in the kitchen sink which was full of water. It was fully submerged for at least 3 seconds, took it out and the screen was going mental, turning off and on and flickering. I got the hairdryer on in for a few minutes, then left it for 10 minutes and turned it on.. it kept saying i had something plugged in the headphone slot so i gave it a shake and another blast with the hairdryer and it was fine since. No idea how I blagged that, I even sold it to envirophone last week and they check for water damage....