A brainstorm about car wash
Regular old dish detergent is usually not recommended. If you put your dirty wash cloth into the soapy water, it will put all that grime back in the soap. Rinse your dirty cloth before you put it in the soapy water. Clean in places where grime and dirt might be hiding, like behind bumpers and around the license plate. Many experts say to use one of those power sprayers a couple times a year.