My bathroom and kitchen are tiled, and are grouted with white. After many years of use, the grout is looking tired and downright dirty. There is a little mold in some areas that are closest to where water is used daily. The bottle says to "Spray on; Let penetrate; Brush in; Wipe off". Although it says it's for white bathroom grout, I decided to try it in my kitchen. I figured, bathroom...kithchen...what difference does it make? White grout is white grout!
I followed the directions, and waited for "brush in" and "wipe off" stage. It seemed to work quite well when I got a small bush to scrub the grout gently. Some of the crud was being cleaned now, but it didn't seem to do anything to the deep-set mold that had settled into the grout closest to the sink area. Maybe that was more than this cleaner was formulated to do. However it did seemed to make my tiles shiny as I wiped away the grime.
I soon found out that the shiny tiles were actually due to a weird film that this grout cleaner left as a residue. No matter how hard I tried to eliminate it, it wasn't going away! The film lasted for several days and every time I touched it, it left fingerprints. This made my kitchen look messy, like something sticky was on the tile. So even if my grout was cleaner, my kitchen didn't look that clean.
The product cleaned okay, but not as easily as the directions claim it will. There is a little more elbow grease involved in the cleaning of the 'traffic' areas. Although the label says it has no odor, it smells a little chemical-like. I'll probably look for another product next time, but mostly due to the after-film it left. So honestly, even if it cleaned like a champ that film problem turned me off.