[jerryhawthorne]

I have found that the brake cleaner from NAPA is a great cleaner and does not leave any residue. Also cheap. No lubrication but great cleaning. Of course, I have been known to be wrong most of the time. Just what I use.
Jerry

PS: I agree with codefox that it is more accurate to take and count the turns precisely to tighten down the trimmers. Then remove or loosen up to spray or all the way out with the screw and carefully remove and clean the mica. I believe in the brake cleaner spray, leaves no residue.