Then you would have a self-cleaning car. Optimus threatens all those drive-through car washes.
Owner: Thanks for the ride home, Optimus. Why don't you wash the car while we are showing and eating dinner. Throw a couple coats of wax on it too, it's been a week since you did it last time. And try to keep the wax off the black trim this time, that took you over an hour to fix last time! If you do a good job you can have some chips. How about enough to fill expansion bank #4?
Optimus: I would like that; it's getting difficult to remember everything you've been teaching me lately.
You should trademark "Biff's Auto-bot Detailing".