I can't get rid of the black spots on my shower grout. I have tried the shower cleaners and bleach, and have even had someone re-grout the shower. Is it possible to clean the grout, or do I need to remove the tile and start over?
You have two options: Stain the grout a darker color to hide stains, or remove it and regrout. You mentioned already regrouting, but you can’t do that wout removing the old grout first. A wide variety of power tools and hand tools are available for grout removal. Once the old stuff's out, apply fresh grout that is stain-resistant. Stain-, mold- and mildew-resistant grout is more expensive, but worh it.