Try something with citric acid like Comet Spray Bathroom Cleaner (spray). I use it on our shower doors with no issues. No more film and leaves the doors sparkling clean.

OK, thanks, I'll give it a try.

Easy Off oven cleaner in the blue can will remove soap scum and buildup in showers and on glass. LimeAWay should also remove the buildup on the glsss. i would be hesitant to use a razor blade, it can scratch the glass

OK, the Comet didn't work. I've used razor blades on three different sets of shower doors now in three different houses with no scratches. In the first two houses, they removed all the buildup. In the current house, no doubt due to the water quality and the chlorine injection system we must use, I am not having the same results.

I will try Easy Off. A local glass installer has recommended a product they sell which is applied as a paste and left to dry which I'm going to also try.

So you think the film is from water deposits rather then soap scum? if that is the case them Lime A Way would be what I would use

I'll try it. At this point, there cannot be any "soap scum" left on this glass.

It’s from hard water and the paste from the glass company does work. You scrub it off with the scrubbie sponge it comes with.

It sounds to me like the glass might be etched. In which case I think it could be polished out? Maybe the paste is a polishing compound. But I’m imagining some tools would be required to polish effectively.

My shower glass guy said to use Magic Eraser. We have hard well water, and that has done the trick!

Magic Eraser didn't do it. Lime Away made significant progress!! It didn't remove everything, but I'd say the improvement was significant and very noticeable.

Based on time invested, a thumbs up from my wife on appearance, and need to move to other projects, I'm calling this one done.

Oh yea, about that regular squeegee after every use, its just another one of those things you know you should do, but sometimes you just don't do it. Besides, I never encountered such difficulty at the other houses when I wanted to spend the time to make everything look new again, and thought that would be the case here. Not so! I'm now wondering just how good our water softener really is.

Thanks to everyone who took time to offer suggestions.

Oh man!!! 10 yard penalty for not mentioning that you have a water softener ;-)

What I do is mix vinegar and dish soap (doesn't have to be Dawn) in a 1:1 ratio. Spray that on, leave it for 15 minutes, and wash off. Be careful because it washes off very slippery on the shower floor.

As a daily spray, instead of squeegee every day, I mix 100 ml of vinegar, 100ml of alcohol, and 100 ml of dish soap into a quart spray bottle. Fill it up with water and spray walls and door after the shower. This will not clean anything, but it seems to make it much, much easier to clean the walls and door later. I have the white Scotchbrite pad in the shower and stuff comes right off with that. And don't ask me why I measured in ml instead of ounces. I grabbed a measuring cup out of the garage and that's how it was calibrated. 100 ml was my starting point and it worked pretty well, so I stayed with that. Also, long ago when the shower wall sprays first hit the market, they listed the ingredients as vinegar, alcohol, and soap, so that's the only reason I picked those.

On the topic of soaps, when Zest first started advertising in the 50s, they said it didn't leave soap scum behind. Before that we always used Dial soap, but I've been using Zest, now, for 60 years. It does make a difference.

Depending on where you live the water may contain silica. If so, nothing will remove it. New Mexico has this problem.