I don't know how they do it...you would think all automatic car wash gizmos wouldnbe about the same. I have admitted to myself that the touchless washes should actually just be called 'Car Rinses' because that's all they really do. Shining Star does an excellent job, though...my car always comes out clean and sparkling and smelling great. Free use of vacuums with a wash and don't forget to tip your dryers!