I had recently moved into a new (used) home. The previous homeowners didn't make the home ready for move in so my boyfriend and I had to do all the cleaning. One of the areas that needed attention was our glass shower doors! Full of hard water stains - You couldn't see a single thing through them! I honestly thought we we're going to have to replace our shower doors. NOPE. Today, I had just tried this. IT'S AMAZING! I barely had to scrub. Just spray and wipe! :) The only negative thing I have to say about this product is that the fumes are very strong. Other than that, I'm always going to use this product for my showers/tubs. Definitely recommend.