I also had problems with the digitizer after a day in wet conditions. After some hours on a heater it worked again, but only sporadic. So I disassembled it a little bit to get to the digitizer-plug and cleaned the plug.
When water has been in an electric device, the problem is not the water, its the salt, and that remains even after drying.
And with new moisture,even if its just a little bit from the air, makes an short circuit again.
So far, after cleaning the phone workes:).
Josch