Better than the rice trick, disassemble your phone as much as you can, then soak it in >90% isopropanol (rubbing alcohol). Dry it by blowing air duster on it and into crevices.

Repeat this a few times, soaking/dousing it in isopropanol and drying it with air duster. It saved my phone.

You'll probably have to dissassembly the LCD screen and carefully wipe it off to remove streaks.