What should I use, if anything, to lube the teeth and gears on the underside of my 2 big slideouts? The smallest slide-out (bedroom) has no exposed gearing so I guess I can't do much with that one.
Any dry lube will work but if it's wet product it'll attract dirt, dust etc. and have the opposite effect you're looking for. MOST manufacturers recommend no lube at all but keep it clean.