Black Diamond Stoneworks ULTIMATE GROUT CLEANER: Best Cleaner for Tile,Ceramic,Porcelain, Marble Acid-free Safe Deep Cleaner & Stain Remover for Even the Dirtiest Grout. (2-Quarts/1-Brush)

This product is great! I used it on Friday, and I can’t get over how beautiful the grout looks now- it even smells better! Quick and easy. I did buy a grout brush that could be used standing up, and that worked well.

I wish I had taken before and after pictures... I used this in a very heavy traffic bathroom. It worked really well in all the areas with lighter traffic (around the walls and such) but it didn't get the heaviest traffic areas as clean. All in all I'm pretty happy with the produce and I would recommend it as it is super easy to use (with a little elbow grease). I am hopeful that after several cleaning session in the center of the floor all the grout will look the same and I can finally reseal it. Either way it looks way better than it did.

My kitchen has tile countertops. I have always had a tough time keeping the grout clean. This product was amazing; it cleaned the grout quickly, with very little scrubbing required. I am very happy with this product.

I read about a lot of tile cleaning/grout cleaning products and most if not all sources directed me back to this one.This item comes with two bottles, two spray heads and a grout cleaning brush which worked pretty well.I used this product on various applications including kitchen and bathroom tile. One of the first things I noticed was the product Worked! Well sort of. It did what it said, and that was clean the grout lines, to a point. The grout lines in question are white, but have turned to a brownish color over the years. This product made them less brown, but they are still brown overall.I also noticed this product dries rather quickly so you cannot let it soak for more than a few minutes before it essentially dries up.Perhaps I was expecting to much from this product, but it did clean the grout lines to a point. Maybe additional applications and elbow grease will do the trick, only time will tell.

I used this product on my kitchen floor grout. It was just regular dirt and grime, but it had been neglected for years. What should have been a lite putty color was literally black. I was skeptical, but I followed the directions and it worked great. My grout looks like new. I bought the small brush that they recommend, but ended up using a regular sized scrub brush because it was easier on the hands. It worked just as well. This product is great. Thanks!

I really like this product. It makes "grout cleaning" almost easy. To date, it is the easiest, most effective grout cleaner that I have ever used, and I've tried many products. Highly recommended.

I would like to say that this product made a huge difference, but that would be a lie. I would like to say it made even a little difference in how clean I got my grout, but that would be a lie. In a nutshell, this does not work. I’ve tried it multiple times with absolutely no improvement. I’ve let it sit longer than the recommended amount of time, scrubbed longer then should be necessary, and repeated. Absolutely no difference. Total waste of money.

Does not do as promised. Any bleach containing product works better