Duh.

There's a string wax I got kinda partial to - especially for waxing my cables - when I was shooting my compound regularly, called Black Lightning. It's impregnated with silicone and graphite. Regular ol' Textite wax would scrape off and build up on the cable slide. The Black Lightning never did that. I think it helped the cables slip through the slide easier. I liked to use it on my string loop too.