Typically these cars never need to be washed. We don't take them out if it looks like rain. But many us got caught in the rain during a cruise recently and I told some friends about the sponge at CVS. Which is right next door to the lot we show our cars and have a beer. No bs here. The boys love it and have asked about the stock as well after I told them I banked 40k. Still loaded though...Of course I had to turn them on to it don't you know........go spng!