Hi Sheila. I'm Cindy. I use Scrubbing Bubbles (with the blue lid) to clean our shower. The trick to using it is to spray it on and walk away. Wait at least 15 mins, then use a clean cloth to wipe the shower done. I have used this product and happy with results.
This is the mixture I use:
Fill a spray bottle with a 50/50 solution of Dawn dish soap and vinegar. Spray it on the shower and let it work. If they are tougher stains, you may have to scrub with a plastic scrubbie!
Lysol Power Scum cleaner in the blue trigger spray bottle with a Magic Eraser or a scrub brush.
Wet & forget shower for a slower, no scrub solution. You can use 2x a week to accelerate the cleaning process then once a week to keep it clean.