Hey guys, so I have a pretty big marble tile and grout job coming up. I've done some smaller bathrooms before in the past and was actually afraid to use a regular stiff nylon grout brush in fear of scratching the glazed shiny marble tiles. Again these were small bathrooms and I used a toothbrush to clean it and it worked perfect. Theres no way I can do this next job with a toothbrush haha, so Im wondering what the best grout brush is to purchase that has soft bristles like a toothbrush that won't scratch the shiny marble tiles?