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.
There is not alot that can be done. Spray a bit of dry lube, like a teflon product on the gear teeth. Use an Amour All type product on the rubber seals to keep them soft. Wax the sides of the slides to keep them slippery. 15-20 minutes work twice a year at best.