For more predictable cleaning, it is generally better to use baking soda as a scrubbing paste or vinegar separately on compatible surfaces rather than relying on the mixture as a powerful cleaner.
Do Not Mix Different Cleaning Chemicals
Household cleaners should not be mixed indiscriminately. In particular, never combine bleach with vinegar, ammonia, or other cleaning products because dangerous fumes can be produced.
If you have previously used another chemical cleaner on the floor, rinse the surface thoroughly before trying a different product.
Removing the black residue is only part of the solution—the way grout is maintained afterward can determine how quickly the discoloration returns.
How to Keep Grout Cleaner for Longer
Once the grout has been cleaned, a few simple habits can slow down the return of dark stains.
Clean Spills Quickly
Oil, sauces, beverages, muddy water, and other spills can penetrate porous grout if they remain on the floor for too long. Wiping spills promptly helps prevent them from becoming deeply embedded stains.
