Maybe there's still residual water in the phone? When I dropped my phone in the toilet about a year ago, I put my phone in a big bag of rice (only about $2-3) and that helped pull all the excess moisture out of my phone. Worth a shot anyway!
DEVICE: Sprint HTC One
ROM : (ask me tomorrow)
Devices: Pebble 1st Generation, Chromecast (rooted), Chromebook (Ubunutu), ASUS TF101, Surface RT
Previous Devices: HTC Hero, HTC EVO 4G, Samsung Galaxy SIII