Multi Purpose Cleaner and Professional Hard Stain Remover - 20 oz.

I never believe anything advertisers say. So I was skeptical. Guess what? It actually works. I've tried everything on this one window. Only thing that worked was this product.

This is the ONLY cleaner that got hard water spots off of my exterior windows! Before I got my front yard sprinklers adjusted, that irrigation water was spraying all over my front windows. Nothing else worked to clean off the hard water - vinegar, Mr. Clean sponges....then I found Diamond Magic online recommended by a professional window cleaner. Make sure you follow the instructions exactly. I found it was best to remove my window, lay it flat, use cleaner as instructed, wipe off the initial residue, then I carried the window to my bathtub and gave it a final rinse. Again, this is serious stuff, so make sure you follow the directions on use.

Have tried everything I could think of to get hard water stains off of my glass shower door. All required hard work and still didn't do the job. I have a waterproof shower scrubber. Put some of this on the scrub pad and went to work on the doors. I wish I had found this sooner. No harsh smell and truly got rid of the water stains. Alot of the product is not needed however I am getting a second bottle in case I can't find it online again. Seemed costly when I purchased it but worth every penny. I highly recommend this product.

After testing this cleaner on hard water stains on glass shower doors and chrome faucets, I'm impressed. The micro-diamond formula effectively dissolved stubborn white spots that other cleaners left behind. A little gel goes a long way; the 20-oz bottle will last. It requires some rubbing and rinsing, as a slight hazy residue can appear if not wiped thoroughly. The professional-grade power is evident, but it's not a zero-effort product. For the price, it delivers genuine results, making it a worthwhile solution for tough bathroom and kitchen stains.

I have a shower door that probably has near 15 years of hard mineral water deposits on it. I have tried every cleaner and even steam. Just nothing. While I used just Diamond Magic, a rag, and elbow grease to get a small section off I ultimately used my Griot's Garage 6" Random Orbital to save some time. While it saved a ton of time and energy PLEASE TAKE precautions like hearing protection (normally you don't need to but shower walls are hard and reflect sound), eye protection in case some Magic Diamond flies off orbital into your eyes, and most importantly appropriate safety measures when using electrical devices near water. With the orbital it took me an hour but the glass looks brand new. See the photos of before and after in the same spot. Night and day difference. Could never have accomplished this before with other products. Removed all deposits albeit the edges of the glass by the frame are real tough to get clean. No scratches to the glass that I could see either. I will be using Diamond Magic from now on and referring strongly to friends.