Wow!
OK, I admit it. I was skeptical at best before I tried this product. I ordered it thinking that I had just wasted 15 bucks. However I was desperate. My brand new car had gotten pummeled by my neighbors sprinklers. After a deluxe 30 dollar car wash I realized that nothing was going take the water stains out. I tried pretty much every product on the market to get these spots out with no avail. I even tried windex, ketchup, and coca cola. I was left with nothing but a sticky smelly car and a bee sting. The body shop told me that they would have to replace two windows, a side mirror, a windshield and also repaint the car to the tune of almost 2 grand. Apparently the sun had "etched the water stains into my car." Out of desperation I ordered this product. When I got it in the mail I thought that I had been ripped off Angrily I tried it out. IT WORKED! The first application took most of the water spots off however it did take between 2-3 applications to get everything off entirely. I also had to scrub very hard. However I think the 15 bucks and a lot of elbow grease is better than 2 grand and a week without a car!

You will not be disappointed!!

Hard Water Spot Remover
This is the only product that I have tried that works in removing hard water spots (from lawn sprinklers)on windows. I could barely see out of my car window and nothing I tried would take those spots off. Only this, Spot-X. I was very happy when I discovered it.

Way worth it!
All I can say is that this stuff works.. and works great. I bought my car from a seller in L.A. California (I live in North Carolina). It was in great shape except for hard water spots all over the windows (I assume from acid rain or something). The windows almost felt pitted, and I thought all I could do to fix them was to replace them. I bought Spot-X after reading all the praise that it got from Amazon. They were right, it works wonderfully!! No more spots, the windows are crystal clear, and feel like they've been waxed. Spot-X is well worth the money.

Stuff works!!!
I used this product on my '08 Honda Fit windows to clean off mineral deposits received from the lawn sprinklers. This stuff works! I spent over $50+ on liquid and foam cleaners to no avail and finally decided to get this. The mineral deposits had been on the windows for more than two months but sure enough I followed the directions on the bottle and instantly the deposits were gone. I didn't have to use too much elbow grease. I'm a believer now! It's a shame this product didn't work for some people because it worked for me.

hard water spots
This product does not work, I have glass shower doors, are water is hard, and really they were not that bad, and it does not remove the water stains.