WOW! I purchased this product to clean grout on our kitchen floor and front entry, and I am amazed at how powerful and easy this cleaner works. I've always used acid based cleaners for grout lines and tile, but this product out performs anything that I've ever used. This is now my "go to" cleaner for everything. I highly recommend the product, and if I could give it 6 stars, I would.– Jesse J.