I've heard people using a graphite spray, and WD-40 makes a silicone spray too that others swear by. I took to using a cube of paraffin wax on the teeth on my old soft top for the back window that was always giving me hell. Zipper function was smooth as butter after that. A good scrubbing of the teeth with a toothbrush and some mild detergent/dish soap and water before putting anything on it will help.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!