If used properly the results are AMAZING! Read some of the one star reviews here and suggestions are: (other than the ones on the instructions sheet) 1. The scrubbing after putting cleanser the grout will not turn super clean. And that’s ok. Just no dust/dirt on the floor. 2. Put THIN line of product into the grout. The more you put in, more cleaning is required. Use the brush horizontally. 3. For the wipe off after you run the finger needs to be FLAT. IE grout lines are U shaped, tiles are flat around the grout. Fold the cloth so it has a straight edge. The cloths folded side should be perpendicular to the grout line. DO NOT push the cloth into the grout, pressure on folded cloth for cleaning tile should be on the flat tile (two sides) not on the grout (center). The cloth needs to be cleaned ever so often so you are not spreading the previously cleaned grout on to the tile. I cleaned it for every two tiles and changed the folds for every tile.