I had a tile guy put down tile in my laundry and bathroom, but he didn't wipe up the grout on the surface. It has now hardened to the treads in the laundry room tile and in the nooks and crannies on the slate tile in the bathroom. How could I go about getting it off? My new tile now makes the floor look like it is dirty all the time! :rolleyes: Any help is greatly appreciated.