Well, assuming that the unit in question hasn't been hooked up to a power source in a long, long time, any charge that may have been retained has probably long since dissipated. If you HAVE hooked it up to a power source however, I'd suggest unplugging it and leave it sit somewhere for a few days, possibly a week even, if you'd like to be super careful.Originally Posted by Great Hierophant
After cleaning, set it up close to a fan for a few hours on each side for a few hours, depending on how much you want to make sure that this thing is "bone dry". If that's not enough, let it sit out somewhere for a day or so.
Mind you, I'm no electrician, but I'd say that'd probably be your safest bet if you plan on hosing it.