How can you, or can you, get hard water stains off shower doors?

You can! If you'd like to do it in an eco-friendly way, white vinegar can do the trick. Put white vinegar and warm water in a spray bottle. Spray it generously on the doors, wait a few minutes, and scrub with a sponge (not just a cloth). You'll need some elbow grease and you may need to do it a few times, but it works! Also, a tip - put some kind of essential oil into the spray bottle so that your bathroom doesn't smell so much like vinegar

I usually use vinegar+ magic eraser to get the tough spots, best of luck!

White vinegar mixd with water 50/50 and a dab of dawn dish soap.

Try vinegar and a bit of warm water.

do ya'all use plain white vinegar at 5% or the higher strengths 10% , 20 % ?