Right about the heat, definitely something to be careful with for the mechanical parts. (The electronics, not really so much... anything that can survive the le

Right about the heat, definitely something to be careful with for the mechanical parts. (The electronics, not really so much... anything that can survive the lead-free reflow profile has some pretty solid heat tolerance.) And also right about not washing speakers and microphones, I'd never put those through a water or solvent wash once their protective taping was removed. Surprisingly XOs are not really known for wash issues, at least these days (I think they're all hermetically sealed now), but they are notoriously sensitive to ultrasonic cleaners. So be careful there.