Pour a small amount of baking soda directly onto the tile grout.
Spray white vinegar onto the baking soda; you’ll see a chemical reaction occur that will help loosen embedded dirt.
Use the toothbrush to scrub the grout. You’ll immediately notice a difference between the cleaned and still-dirty areas.
When the dirt is deeply embedded, feel free to scrub a little harder for better results.
Cleaning Tiles
Once the tile grout has been thoroughly cleaned, a thin film of baking soda remains, which can make the tiles look dull. To remove this film and get a shiny floor, here’s how:

Fill a bucket with approximately 5 liters of warm water.
Add a tablespoon of black soap and mix well to obtain a homogeneous solution.
To remove baking soda residue, add a tablespoon of white vinegar to your cleaning solution.
Clean your floor with this solution. You will notice that the opaque appearance of the tiles disappears, leaving a sparkling floor.
If necessary, repeat this step once or twice to completely remove all baking soda residue and obtain a perfectly clean and shiny floor.
These few simple steps are all it takes to bring your tile joints and floor back to life. With these natural products, you can achieve effective cleaning while respecting the environment and the health of your family.