We have ceramic tile. The grout is not sealed. I have no idea why the previous owners chose not to seal it. In areas where we frequent the most, the grout is black. Mopping does not help. You can see the difference in color in the areas where it is not used. While this is not obvious to a visitor, it drives me insane. What can I do to fix this?
The grout is black and it should be a light gray color
The grout is black and it should be a light gray color