On the chassis side basically can not be cleaned by hand, and dirt on the chassis are car people should not be ignored, stolen long stick in the chassis corrosive automobile parts, damage "seal" to reduce the car's life, and self-service washing machine high pressure spray bottom, you can put a lot of sediment and dirt washed away. Automatic washing machine into the car, the washing machine can complete the entire washing process. Include: foam cleaning, water spray wax, wheel cleaning, chassis clean, dry. At this point the car drove out of the washing machine, the vehicle surface bright as new!