Shower doors - nothing seems to work?

I’ve lived in my apartment for 6 years, and have tried a number of things to get the soap scum off my shower doors… nothing works! I’ve used Scrubbing Bubbles, Mr clean magic erasers, vinegar/water, Lysol cleaner, some sort of ‘green clean’ product the complex gave me when I moved in, even bleach. I’m not sure if hard water is a factor too.

The days before Thanksgiving are my ‘deep cleaning’ days, so I’ll have some scrubbing time. Any recommendations on how I could get the glass clean again?