I promise I searched the Internet first. Has anyone done this? I have some that I picked up second hand that are filthy. I’m certain that a THOROUGH cleaning and lubing would have these things restored. I just need some assistance before I begin this endeavor. I don’t want to break anything either and usually find things are simple when given proper instructions. Thank you! P.S. I don’t want to send them to Tennis Machines. I want to do it myself.