Pretty much what I do. I used to wash the cars about one a month in the driveway, but I gave up. 2 of the 3 cars are outside because the bikes take up half of the two car garage so its difficult to keep the cars clean for more than a few days. I should do what @pronstar does and get a monthly unlimited wash membershipMy car gets washed by the rain. Occasionally a gas station car wash. I might put a sponge to it once a year, when the inside needs to be detailed.