We moved into our house four years ago and I forbid my family from using the jetted bathtub because I wasn't confident on how to ensure it was REALLY clean and it just seemed like a lot of time and effort to clean the jets. I found this cleaner and decided to give it a try and I couldn't have been happier. I did repeat the process three times, because the tub had sat there for so long without being used. But the amount of grime that this solution pulled off the tub and the jets was remarkable.It was no effort at all to run the jets with the solution, drain the tub, and wipe it down with the included microfiber towel. So impressed!