First… Why clay your car? Over time the contaminants in the air land on your car and if not removed in a timely manner they bond so tightly to the exterior surfaces that washing will not remover them.  These contaminants create surface texture, which reduces gloss because gloss comes from a smooth surface.  Because normal washing with car wash soap and a wash mitt won’t remove bonded contaminants - the most effective way to remove these contaminants is via a mechanical means called mechanical decontamination. Mechanical decontamination is done to a car after first washing and drying the car and...