How do I get hard water off glass shower walls?

Hello Hard water woes are frustrating. Have you tried Lime Away?

Perhaps the product reviews and Q&A might assist you at this link

https://www.amazon.com/Lime-Way-Calcium-Cleaner-Bottle/dp/B0063KBGZY

Alternatively-Internet sources have also said that there’s been a success with this method.

“High-strength vinegar. I got it at the grocery store, sold with the regular vinegar, in a gallon jug. I sprayed it all over the doors, applied paper towels, and sprayed them again so it would soak for awhile. Scrubbed with a scotch brite type pad and it came off. Regular vinegar had done nothing, it had been like spraying water. The high-strength vinegar was like a miracle. I could actually see the cloudy mineral deposits coming off as I sprayed. This was after literally 4 yrs of shower door heck. I was so incredibly happy!! I now pick it up every time I go to that grocery store to keep a gallon of it on reserve at all times.”

http://cleanmyspace.com/full-strength-vinegar-double-strength-vinegar-and-white-vinegar-whats-the-diff/

Please be sure to read the product labels and wear your protective clothing and gloves as labeling directs.

Short of getting an expensive water softener system, We have to be discipled to fight to prevent the mineral deposits and water spots. Routine drying out the shower enclosure, shower glass -all metal faucets- fridge water dispenser and bathtubs have to be done with towel and or squeegee.

Cut a grapefruit in half and use coarse kosher salt to scrub.

Lysol Power scum remover in the blue trigger spray bottle with a scrub brush.

Wet & Forget shower will remove over time without scrubbing as well as keep them off in the future, as long as you don't have marble.

Try CLR or soft scrub with a scrubby.

Baking soda and vinegar. Comes right off!

Belive it or not - oven cleaner. Souray, leave several hours. Wipes right off. Also works wonders for fiberglass pans and walls. Easiest, cheapest, best product I've found to cut the build up.