I tried every suggestion in this post and nothing worked for me. I live in New Hampshire and it makes sense stains will be different depending on where you live. Finally, I found the solution ...a pumice stone. There are several brands available online. I found this one in my local grocery and hardware store, and it's pretty inexpensive. Just use with water ..it didn't take a lot of muscle....just a little patience but it worked beautifully. I had gone so far as to get a quote for replacement shower doors and stumbled on this product just before I was ready to place the order. So glad I tried it because new doors were more than $800. Just wanted to share in case it helps someone else!

The SIMPLE ways to remove hard water stains: There are some simple ways to remove hard water stains quickly and easily that will remove even the most stubborn stains and make your fixtures and fittings literally sparkle like new! One of the most overlooked factors when dealing with hard water stains is realizing that they contain either calcium or magnesium. Therefore, they can be tackled by using completely natural acids that are found all around the home, are totally safe to use and could save you hundreds of dollars on expensive cleaning products. * white vinegar and lemon juice! White vinegar, a weak acid, is about 5 percent acetic acid. It will remove hard water deposits from glass, rust stains from sinks, and tarnish from brass and copper, and works perfectly all around the home when combined with the correct ingredients. Lemon juice, another weak acid, contains citric acid, which can be used in much the same way as vinegar. By using these simple, natural ingredients that are found all around the home - and in some cases combining them with other natural products for really stubborn stains, it is possible to remove limescale and water stains cheaply and in a way that doesn't harm our planet.

We have pretty hard City water. I occasionally Lemi-shine. It worked good! Available @ ACE's & other places. There's a dedicated dishwasher-cleaner, & a combo DW detergent/cleaner. I used the combo product. Softens water while washing....as does... 20 Mule-Team Borax! Obviously, this stuff has been around forever!! Link below has tons of info. on it. I've used it in the laundry. It's also effective for some insect-control!!! (Don't worry!!! It doesn't work CHEMICALLY.) Faron Here is a link that might be useful: Borax info...

I always use Invisible Glass on my stainless steel appliances with great results. Sometimes for more difficult water stains I use the liquid form of BarKeepers Friend. You could use the powder as well, just make sure it's well watered down before applying or it could scratch.