i found some stuff at the super market in the cleaning section called "Fabuloso" that says doesn't need rinsing off cause it leaves no residue, cleans anything, plus smells sweet, mix 1/8 cup to a gallon of water, i mixed 3/4 cup & less than a quart of water in a windex bottle, the stuff comes in quart & gallon bottles, ran my truck out here in the sand dunes all day, shot some of this stuff on & blew it off with air, damn thing looked like new!!! & its only .97 cents a quart!!, may not be able to get it where you are, i'm in California & with a name like "Fabuloso" may be local stuff but i'm gonna buy about 5-gal. of the stuff that should make 300-400 gal-lol, its made by Colgate-Palmolive in Mexico