We recommend you wash your vehicle a minimum of twice a month. Wash frequency really depends on the climate and environment where you live. In Wisconsin, it is important to wash frequently enough to remove pollutants that stick on your vehicle’s surface such as acid rain spots; harsh dust which, if rubbed can scratch the paint; bugs, which will bake into your paint; tree sap, which will etch your paint; and magnesium chloride/ salt, which will ruin your chrome and metal surfaces. The longer you leave your car dirty, the harder it is to clean and maintain the interior and exterior of the car. Industry experts state that a properly-maintained vehicle will retain its value longer and garner a higher price when it comes to resale.