How often do you wash your car and how? We usually train a hose to wash off the dirt from the entirety of the car before applying shampoo and then hose it again for rinsing. But a relative advised us to use a pail and a dipper which can save a good amount of water. Based on our computation, a pail uses only less than half of water when using a hose. And although it entails more labor, I guess it is worth to use the pail and the dipper for cleaning the car. This is most practical during summer time when water is scarce.