googled, i did had my aa wet a couple of time in the pool (you know the only place you don't want it to go... damn murphy's law..). well i used the vacuum to dry it, i put the tube under the rx. this way it sucked where the hole is and water seems to find it's way between the plastic and foam.

also i oiled the on/off switch with seewing (sorry i don't know how to spell it...[&o]) machine oil, you also use 3 in 1 oil. it prevent it from rusting.