dry a device
droped my Samsung Galaxy S2 also in Water. There was absolutely no function.
I disassembled as much as possible (remove back cover, battery, SIM-card, SD card, ...) and rest it 3 day on a top of a radiator (normal temp). After this I put it in a cookingpot.
To prepare the cookingpot as a dryer:
-bottom layer 10mm salt
-upper layer 20 to 30mm rice
- last layer your device and all parts you disassembled.
Cover it or put it in a plastic bag to prevent fresh humid air coming in and wait for another 7 days.
After this remove your device out of the cooking pot, assemble, recharge battery and good luck