1. Prepare the Cleaning Solution
In a small bowl, combine Borax with lemon juice (or vinegar) and warm water. Stir until dissolved to create a paste.
2. Apply to Grout
Spread the paste over grout lines, focusing on areas with visible stains or discoloration.
3. Let It Sit
Allow the solution to sit for 10–15 minutes. This gives Borax time to break down dirt, grime, and mildew.
4. Scrub Gently
Use an old toothbrush or grout brush to scrub along the lines. Circular motions help lift embedded dirt without damaging the tile.
5. Rinse and Wipe
