Ultimate Grout Cleaner for Tile Floors — Acid-Free Deep Cleaner Removes Grease, Dirt & Soap Scum Without Damaging Grout — Safe for Marble and All Natural Stone (1-Qt/1-G/ W/brush)

Works well and definitely gets dirt and grime out of the grout. I bought a grout brush that I could use while standing up, so that I could really scrub my floors. That seemed to help a lot as well.

AMAZING STUFF. Works great, cleans our grout so well. The brush this stuff comes with is also fantastic.

This product was disappointing. Marginally restored grout. Rated as one of the better products it was not that effective.

Pros - low odor, easy to apply, not irritating to skin, works well in light to medium staining. Easier to clean up out of grout than any powder or granular product. Cons - need to apply dnd scrub longer and more than once on tough stains. In the end, elbow grease and a good grout brush are necessary no matter what you use on heavier stained areas.

Wow—this stuff really works! I recently purchased Black Diamond Stoneworks Ultimate Grout Cleaner for my kitchen tile floors, and I’m seriously impressed. Years of built-up grime and dirt were no match for this cleaner. My grout looks brand new! I’ve tried other products before, but nothing has delivered results like this. So pleased with my purchase—definitely a game changer for anyone dealing with stubborn grout grime!

Doesn't clean the grout any better than other cleaners. I won't be reordering. Still looking for a white grout cleaner that works.

Our white tile floor with white grout was very dingy after 3 years of use. We discovered one factor was using a steam cleaner on it, because it forced the dirt into the grout areas. Only Swiffers from now on. Anyway this cleaner brought it back to new. It does take some work, doesn't just swipe off, need lots of scrubbing, but worth the effort.

This product did not work at all. Returned and bought another product.