It barely works, after spraying i waited a few minutes to let it soak and it had dried out, so I had to spray it on and scrub it right away which is not as effective.. Will not be buying again and pick up the one I get at home depot which is excellent (clear bottle and clear liquid forgot the name)

It does an alright job I guess, but I'm going to need to do it a few more times to get residual white paint flecks from our contractors crew up out of the chamois grout. The dry wall dust that apparently got damp and "stuck" came up enough to be acceptable on the first try. I used a super stiff grout brush with.

This stuff is AMAZING!! The grout on my kitchen floor is kind of beige, but there are spots where you can't even tell what the original color was, and some spots are dark brown or black from 14 years of people and dog foot traffic. I can't use anything with bleach in it because it will alter the color of my grout, and I have tried many other grout cleaners along the way, none of which worked. I've even tried an acidic grout cleaner I found at my local home improvement store, but it took three different buckets and sponges for applying, rinsing, etc. I saw positive comments about this cleaner and decided to try it. While it says to leave it on for about two minutes, I've left it on the really bad areas for about 4-5 minutes and then used a small-head, battery-powered grout scrubber, and now my grout looks like new in almost every spot! I'll go over those trouble spots again, and I'm sure they'll look great when I'm done. I can't even begin to tell you how impressed I am with this product. I highly recommend it and couldn't wait to give a review!

Did not work that great for me, certainly no better than other products on the market.

My husband spilled shoe heel dye on the ceramic floor. We were able to use the brush and this product. Amazing, not stain! Thank you.