Suzy homemaker here with a helpful tip.

I found a recipe for tub and shower cleaner on the web and tried it.
Equal parts distilled vinegar and blue dawn dish soap.  Heat the vinegar to help the dawn dissolve in it.  Spray on and let it sit 30 minutes then rinse it off.
I dozed off and let it sit 45 minutes and it took a lot of rinsing to get it off.  I'd suggest wiping while rinsing.
Anyway, it got rid of the mineral deposits and soap scum better than any commercial product I've tried as well as cheaper than scrubbing bubbles. I've since seen recipes that were 75/25 vinegar/soap but I only tried 50/50 so far.
Edit to add:
I used 2 cups of cleaner for a small rv shower. Normal showers would take more.

Been using it for years. Works well.

Been using it for years. Works well.

Good to hear from you, TT.  Do you mix it 50/50?