In an attempt to clean out the jacuzzi tub I found some pinterest instructions involving powdered dish washing soap, bleach and running the jets. This seemed odd so I checked and since I saw it on several websites I decided to give it a go. Thank goodness I was standing there because SO MANY BUBBLES formed I had to get a bucket and scoop them into the shower.
For your laughter here is a picture of a bubble filled shower. You step down a few inches and I put a large bottle of shampoo on the floor for scale.
lol. i used just bleach and it worked well. if by well you mean 3 years worth of crud exploded from the lines and almost made me barf.
We are currently running the jets with just water and whatever soap residue is left for 10 minutes. Then we plan to drain it and do bleach. I hope it works as well for us as it did for you because I'm sure this hasn't been cleaned on ages!