To use this method:
Place some baking soda in a small bowl.
Add water gradually until you obtain a thick, creamy paste.
Apply the mixture directly to the grout lines using an old toothbrush or a small grout brush.
Allow it to sit for approximately 5 to 10 minutes.
Scrub the grout gently but thoroughly.
Wipe away the loosened dirt and rinse the area with clean water.
If the grout is particularly dirty, you may need to repeat the process rather than applying excessive pressure during the first cleaning.
Why Grout Becomes Dark
Grout is often more porous than the surrounding tile. Tiny pores and irregularities can trap moisture and particles that a regular mop does not completely remove.
Kitchen grout may gradually collect cooking grease, food residue, and dust. Bathroom grout is more commonly affected by soap residue, moisture, and deposits from hard water. In entrances and hallways, dirt carried indoors on shoes can quickly become embedded in the grout.
