Driven Extreme Duty Glass Cleaner - Streak-Free Car & Home Window Cleaner for Cars, Mirrors, Shower Doors | Heavy-Duty Formula for Tough Grime & Stains

I generally do not write reviews but I would like to do it on this one because it is going to help a lot of people.Here is my story.1. I got this whole house water softner as soon as I bought my new house in 2005.2. 5-6 years down the road I still ended up with hard water stains on my shower glass. At the beginning it felt like the build up was going away with CLR/Lime Away and other cleaners but used to show up right after cleaning. When it became too hard I even tried razor and I still feel bad about trying that it has few nasty scratches that I could not fix now.3. I have tried everything. Literally everything including high intensity Vinegar and beach and everything I found in my web search. Above all lot of time working on it time to time. All I left with was bad painful hands and elbow.4. Finally my wife gave me ultimatum to fix the shower door or put some window film to cover it.5. Replacement was very expensive and finally ended up ordering window film that itself was around $120 because it was decorating.6. After I push order button on Amazon, it got this Driven ad at the bottom which was only $20+. As I was not interested in window film anyway I have purchased this to give it a try and see if it would work. Worst case I would loose $20.7. That was the best decision and even today I feel so good about buying this product. Film came out to be very thick and it was still showing bad hard water stains from inside. So we ruled out using the film and waited for this Driven Glass Cleaner.8. First thing I loved about this was it is not itense like other cleaners. Almost everybody in my house have nasal allergies. Second thing is amazed about the way it works. Catch is it is not like your other cleaner where you spray and wipe. Not at all. You need to work in small areas like 4 inch x 4 inch and it is not going to be done in couple of hours.9. Once I saw the best results with Driven, I have returned window film for full refund.10. As I have been fed up with lot of work with other cleaners for last 10 years I loved DRIBEN because it works after all the hard work. My gestimate is it took around hour to clean in square foot area. You got to be patient. I have purchased black & decker power scrubber but that did not help. What really helped me is cheap rags that I bought at dollar store. Those are very rough but not harsh so there are not scratches on the glass surgace.10. I would like to insist that you should work small area at a time and apply lot of pressure while cleaning for best results. On and off I must have spend 4 weeks to get everything back to normal but I don't care. Because I might have spent 10 times more with other cleaner for last 10 years.I still have some spotty stains at the edges and planning to go another round soon. I have taken pictures before and after and I will attach if I can.