Take them apart and clean it with water . I take the servo tray and radio box off and the tires off too. And then clean the car with what ever you want I have been using a elcectric tooth brush and some other small brush's then make sure to dry it off very well with a compressor to blow it off very well. And then use WD40 and spay all of the moving parts. to make sure they get lubed and the WD get's rid of water that's left over. And you can go as far as to spray all of the plastic parts with WD and then wipe them down and it makes them look just like new and I think it makes it easy to clean it the next time. And you can spay the whole thing down with simple green and wash it of with water . There are all kids of ways to clean you ride. it is up to you and how you want it to look .