Very white joints in a single pass: the method that “dissolves” dirt and washes it away

4. In extreme cases, water and bleach
If the natural alternatives listed above do not give satisfactory results, there is only one way out: turn to bleach.

Wear gloves and pour 3 or 4 tablespoons of bleach per gallon of water. Use the solution to rub between the joints with a used toothbrush and, after about ten minutes, wipe with a clean cloth.

Keeping the floor spotless and removing dirt between the joints is easier than you think: immediately apply the tricks described above to return the floor to its original appearance.