If you are asking about the jets, my tub came with instructions to do this once a month: Fill tub over the jets, add bleach and run the jets. Then empty and refill over the jets, add dishwashing powder and run the jets again. If you mean the fiberglass walls, I find them much harder to keep clean than my old porcelain tub ever was. One of the problems is that the tub is so deep that it is hard to bend over and get to the bottom and so wide that it is impossible to get to the bottom of the far side without using a mop or a long-handleed brush. And I am never convinced that either implement does as good a job as doing it "by hand"!!!