You don't have to use it after you wash it. What I do when I wash mine is wash a section, rinse and then wash it again and leave the soap on there then use the clay bar while that section is soapy and wet then rinse. You just need the truck wett and slick to use a clay bar for it to work right. I find that way saves a lot of time.spitfire2332 said:so you use the clay bar AFTER you wash it really good right? and then wax it and then im good to go for a while right?