When you want optimum results, you must apply to use the claybar. The end result of a well maintained body is the combination of several interventions on the bodywork. The claybar is an essential step because it decontaminates the invisible particles of your body. If you feel after passing a rough contact on the body then you've worked a lot since contact must be smooth and non-porous (follow instructions). Its effectiveness depends primarily on the expertise.
Recommendation: Especially well wash your car, no soil insect etc ... before using the claybar.