Review on 🧽 Fuginator Scrub Brush for Tile and Grout: Stiff Nylon Bristle Brush for Effective Cleaning - Bathtub and Shower Scrubber for Floor Joints and Tile Seams - Bathroom and Kitchen Cleaning Brushes and Supplies by Brando Carpenter

I used the standard large, stiff bristle scrub brush that I use on tile and shower floors. It worked fairly well along with the grout cleaning spray, but I was concerned it would scratch marble floors as it was too broad to just clean the grout line. I ordered this based on the great reviews and it matched the grout line. I was pleasantly surprised when I first used it. Not sure what's so special about the bristles, but I've had much better results with this brush with fewer elbows. In fact, I went back to the grout I had already cleaned with the old brush because the results were noticeable with this one.