water damage not charging unless power down?

Wilfredo Caraballo "let dry" bad idea. This will cause your phone to corrode. Stop using your phone altogether. Do not try to charge it, to turn it on or otherwise use it.

You will have to do some work so that your phone will not totally become a lost cause. Start by disassembling your phone. even so there is know guide as of yet, this teardown should help you getting into the phone. Remove the circuit board and clean all the parts with 90%+ isopropyl alcohol and a small brush. Use this guide to show you how to clean. It was written for an iPhone, but all the points are pertinent to your phone as well. You will also have to remove all EMI shields from the board to properly clean it. Once it is all cleaned, reassemble it with a new battery. This is not optional but a must. After that, re-evaluate for further trouble shooting. Water damage is the hardest to diagnose and to repair since virtually any part may have failed.