Even though most "experts" say that you should not use dish detergent to wash a car, I've been using Ivory liquid for many years. I swear it gives the car a nice shine. The experts say it's too harsh. Does anyone know what that means? I've tried the "recommeneded" car wash liquids, but the suds disappear very quickly. I've washed my 3 week old black RAV4 twice now with the Ivory liquid and it looks great.