wow, finally got rid of the soap scum on the shower door!
I tried yet another suggestion for getting the soap scum off the glass shower door, and it worked easily and 100%!
Squirt a lot of full strength liquid Dawn dish soap on a Mr. Clean Magic Eraser cleaning sponge. Don't use any water. Scrub the glass, and voila! It took just a little scrubbing. I did it while I took my shower so that it would be easy to rinse the glass, and it sure was easy.
I pointed the shower head in the other direction from the glass to avoid diluting the cleaning solution while I scrubbed, and then it rinsed right off.
I have tried everything, and this is the best!