@Arnold D. Cribari posted:Consensus seems to be CRC QD Cleaner is good because it works very well on things like O22 switches, it does not damage plastics, and, most important, use it in well ventillated area and use it sparingly so we don't blow up the house.
What is best way to use it sparingly?
Can we spray a little on a tooth brush outside of house, bring the toothbrush into the basement (where the furnace is), and apply the CRC with the toothbrush on the switch track?
What do you think?
Fumes can go a long way.
Also, some furnaces draw combustion air from outdoors. If spraying outdoors, don't do it near the intake. At least I don't need to say "don't ask how I know this", because I didn't learn it the hard way.
The number of unknown hazards with these products is astounding. I had never thought about the possibility of sparking a fire as a result of cleaning the track. Thanks for the heads-up.
