You know what a dirty bathtub ring looks like... Now imagine what that soap scum buildup is doing inside the jet plumbing of your bathroom jetted tub! Sure, you can clean the surface of the tub itself. But once you start the air jets, all kinds of nasty looking black specks will come floating to the surface if you don't clean the jets, the nozzles, and the interior plumbing system too. (I know because it happened to me.) Those pipes behind your soaking tub with jets quickly become contaminated with infectious bacteria -- some you can see, and some you can't. Fortunately, cleaning the inside of your air tub's pipes, jets, and nozzles is really easy! The hardest part is taking the time to do it on a regular basis -- to prevent biofilm (nasty residue that forms around bacteria in your plumbing lines) from building up in the jets. Here's how to properly clean a jetted tub and remove biofilm yourself in just a few quick steps. See how to make your own jetted tub cleaner and ones that are available in stores.