It did the job for the most part. Cleaned the outdoor glass and shower glass very well. I originally had a lot of hard time with Windex which didn't do much. I did try to take it a step further and test it on the air fry glass, which was greasy and it didn't work. But overall it did what was expected and what I purchased it for.

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.

I tried almost 5 top brand which has strong acidic substances to clean lime scale. In my bathroom glass lime scale were very very stubborn. Nothing worked. Finally this product worked like magic. This is true objective feedback that this is really good product.

Please note use cloths to wipe the material after use. Follow the instruction and video else you would get sub optimal result. Also ware a normal surgical gloves or another gloves as it might hurt your skin next day if you are sensitive.

But overall this is worth buying if you have a stubborn lime scale in wash area

This product is a miracle to me. I bought it last year and just got around to using it because, frankly, I thought my windows were a lost cause and I wasn't looking forward to exerting the elbow grease for yet another disappointing result. BIG SURPRISE!

I live on the North Shore of Long Island, on a cliff overlooking the Long Island Sound. My windows are BLASTED with salt, sand, you name it. I have used many store bought window cleaners, I've tried the home made ones (alcohol, dishwash soap, amonia, etc.). I've even hired a professional window cleaner. NOTHING unclouded my windows. I was seriously considering a home equity loan to replace them. Then I tried Driven. It has been 4 days and I still can't believe my eyes. Not only did it work, but I did not have to use steel wool or anything besides an old terry cloth rag. I could actually feel the salt grime give way to a slick surface of glass. It took no time at all!

I generally don't leave reviews but this product is too good to ignore. I am truly amazed. I even called the professional I hired (who was very apologetic about not being able to restore my windows) and told him about it. I just received the window sealer from Driven and although I haven't applied it yet I have every confidence that it will work as advertised.

THANK YOU TO 'DRIVEN' FOR SAVING ME MANY THOUSANDS OF DOLLARS ON REPLACEMENT WINDOWS!!!

I can't believe I'm saying this, but this product is like a miracle cleaner. In fact it took me a whole lot more effort to research it than it actually took to restore my shower doors with it.

Over the years, I've tried just about every glass cleaner (and many other products) known to man, because I bought a house with some shower doors badly etched from mineral deposits. Nothing ever really worked to my satisfaction in restoring the glass to its original condition. Flash forward to my current house, which also came with a very ugly looking glass shower enclosure. Nothing has really worked there either, and like I said I've tried some hard core stuff.

So when this Driven stuff arrived I decided, based on past experience and the fact that I didn't have a lot of time, that I'd do a little test spot to see if it offered even a glimmer of hope. I started right out with the 0000 steel wool, wasn't going to mess around with anything less. But I wasn't going to exert myself either, I just wanted to know how it worked on its own power with a normal application, no hard core elbow grease involved.

So I put some on as directed, then wiped it off with a wet sponge and dried it with a cloth. WHAT? Is this a trick? Could those spots really be gone, or were they going to come back later (as often happens)? But no, the difference between my test patch and the surrounding glass was stunning! I got so excited I dropped everything and did the entire door with the same level of pressure. Nothing very hard, just applied with the steel wool and cleaned off as described above. And it's like I got a new shower door from that minimal effort. I'm so happy I can't even tell you. Daughter came home and actually commented on how clean the bathroom looked (!?!) even though the only thing different was the shower door.

So based on this result, I'm going to do one more application, a bit more meticulously, to catch anything I might have missed, pick up any smears I left behind and then apply a glass sealer I just ordered (CRL Transparent Polymer Coating Surface Protector) and see how that goes in preventing future hard water deposits. I'll report back on that product later. But just knowing I've found something that actually removes this stuff easily, when everything else failed, is mind blowing. Oh, and yeah, I wore gloves because they recommend it, but there were no nasty fumes (believe me, I've tolerated my share of fumes for the cause). It was in fact quite pleasant smelling. And I'm talking about using it in a very small bathroom without any real ventilation. In fact, it didn't even occur to me to turn on the fan. So bottom line, I really can't recommend this stuff highly enough. Funny how something like this can bring such happiness, but I'm a person who actually worked with a chemist for a while in trying to devise a formula just to clean my shower doors. (Yeah, I was just slightly obsessed.) I came close but still never accomplished what this stuff has. I'm ecstatic.

UPDATE: I mentioned above that I was going to try CRL Transparent Polymer Coating to seal the doors once I got them clean. Well, I did, and I'm super impressed. When they start to look spotty or streaked, I just spritz them with a mild cleaner and wipe them with a cloth and they sparkle just like before. It's been about 6 months and I haven't had to reapply yet, and this shower gets daily use, anywhere from two to three times a day. I'm so happy I've finally found the combination that I can count on to work.