The key to using any clabar system is three things. One, make sure the cars' surface is cleaned to begin with. You do NOT want to use a clay bar on a dirty surface. Two, use plenty of lube that comes with the clay bar. Don't be afraid to use so much that it's just running everywhere, cause in this case the more you use, the better off you are. Three, be sure to frequently turn and fold the claybar, same as you do a cloth when wiping your windows or car surface clean. Something else that is good advise is this; if you decide to use a claybar system, be sure to cut the clay bar in two pieces. This way, if you drop one piece on the ground and it becomes contaminated with dirt, you have a spare clay piece to use.
I recently talked with a guy who has been in the detailing buisness for over 30 years, and he advised me to use the clay bar with dish-liquid in water. He said thats the "original" way to do it, but you have to have the right concentration of dish-liquid, cause too little won't provide enough surface-friction protection. The way the dish liquid works is it breaks down any oils, old wax, and hard surface debris that is stuck to the paint. The clay bar then works to pick this up.
