In reply to Jim C:
Having seen some of the electrochemical corrosion* inside damp electronics, I'm sceptical that a chemical dunk will fix the problem; often, entire PCB tracks are eaten through, and dunking won't fix those. I'm not sure I relish the idea of a corrosive solution to remove the corrosion, and then have to clean all that out, and dry the thing again. I'm out...
* and it's the battery-induced electrochemical corrosion that's the real problem; getting electronics wet with no power attached isn't a problem, provided you can dry them out in a short time. Trouble is, so much portable electronics has a permanently attached battery that the damage is done before you can get the device dry or open.