Just so you guys know,the fumes from brake cleaner even without heating it up is very bad for your kidneys. I was a trailer mech in a trucking yard and used it a lot in the pit,fumes everywhere.It effected my kidneys and now I am very sensitive to those hydrocarbon fumes. If you must use it then use some sort of gas mask not a dust type;unless you do what the troops did in the trenches in ww1 and urinate on your dust mask. True they did.
so all I can say is keep away from the stuff completely. Cheers Ross in Australia