- A spray bottle filled with water;
- A toothbrush cleaning;
- A cotton cloth;
- Sodium bicarbonate.
Preparation and use:
Spray the grout with a little water, apply baking soda on the line in order to make a paste, wait 15 minutes, then sprinkle again with water. Rub the line with a toothbrush cleaning, wipe with a cotton towel, and you will have a perfectly clean grout lines.