I've been using a quick shot of Royal Purple spray thats supposed to be for guns & such because it's what I have, doesn't gum up, but it may not be what's "best".

I wouldn't be afraid to try some fireclean or militec either.

“You never need fear a man, no matter what his size. When danger threatens, call on me, and I will equalize.”
Samuel Colt.

�Common sense is genius dressed up in work clothes.� - Ralph Waldo Emerson