I have a couple of old HP power supplies that each have 4 large 20 watt ceramic wirewound resistors inside. these power supplies are probably 40 years old by now and while they still work fine. when powered on, within minutes the room is filled with that old funky nasty smell of hot dust/dirt/mildew/ old electronics smell. I have opened each one up and using a soft paint brush and a vacuum i have cleaned them the best I can but I need to wash down those resistors to try and de-funkify them. Does anyone know if you can by aerosol alcohol? or is there a safe to use spray type cleaning product that I could hose down the boards with?