How do I get the build up off glass shower doors?

Use a single edge razor blade to scrape it.

SPRAY UNDILUTED VINEGAR AND USE A SPONGE TO CLEAN OFF, REPEAT IF NECESSARY

TLC can usually remove calcium build up. Did you scratch the glass using steel wool?

Try using citric acid powder(from Walmart), Using this in a dishwasher will remove the mineral deposits and make the metal parts shine like new. Citric acid is used in canning to keep fruits from discoloring. Mix citric acid with water to make a slurry to use for scrubbing glass.

I'm surprised the vinegar and Dawn did not work. I use it and it cleaned all the cloudy soap film off of my glass doors.

We fought the same battle until my husband discovered the Turbo Scrubber! It takes the "hard" out of hard cleaning. We ordered ours online for $40, but it is worth every penny. It is also great for those hard to reach areas and even cleans tires on the car! i love it. It takes the cloudy mineral deposits right off the shower doors. They do sell them in Walmart now, and probably other department stores. I love it. It comes with a charger and several brushes for cleaning the door runners etc. I use whatever cleaner I have in my home which happens to be Simple Green because it is non-toxic.

white vinegar

straight vinegar and hope the steel wool has not done destruction

Mr Clean magic erasers will do the trick, dampen, scrub and then rinse the glass

Believe it or not I have used oven cleaner before. I clean for people sometimes. Just dont leave it set on the chrome part, some cheaper ones have aluminum and will mark if let soak on it. I know it sounds kind of strange but did work. Also used it to clean bottom of a tub with the rough part made in finish for non slip

I have hard water and that usually works, takes a couple of soft scrubbings, after you let the vinegar sit on there a few minutes each time. if not dip your brush into a toilet bowl cleaner and scrub softly. (wear gloves and have good ventilation)