I have recently had some tiling to the floor of my bathroom. The tiles are porcelain and slate effect (not real slate). The grout has got into every little crenulation of the textured tile surface and left a bloom in some cases.
What is the best way to remove this without scratching the tile or damaging the grout between each tile space. I know there are products on the market for removing grout but I believe most of these are acid based and I don't want to ruin the tile surface.