
This is the only hard water stain remover that has worked for me. I've tried most of the others here and none have lasted more than a cleaning. They all had to be used daily to remove stains on shower doors. However, I came across reviews and almost all of them seemed happy with their results. That's cool. Definitely gets rid of blemishes, but takes quite a bit of effort the first time. Since it's a cream formula and not a liquid spray, you really need to rub it over the shower glass. Then rinse. Well, that says it will hold up hard water stains for 30 days - that's not true for me. I can go a week without accumulation (which is very good for me as my water is very hard). After using this product I figured out how to take care of my shower glass - I use Hope's Perfect Glass Cleaner every day before bed. It helps keep my glass doors clean. I'll probably continue to use this once a month to avoid heavy build up and continue with my daily glass cleaner.

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