How to Deep Clean Tile Grout

Grout is the unsung hero of your tiled surfaces, but it acts like a sponge for household grime, grease, and soap scum. Over time, what was once a crisp, clean line becomes a dark, dingy eyesore that makes an otherwise clean room look neglected. Deep cleaning isn't just about aesthetics; it prevents the breakdown of the porous cement material that keeps your tiles in place. Done well, a deep clean restores the grout to its original color and sets the stage for a protective sealant application. You don't need harsh industrial acids to get the job done. With the right mechanical agitation and a bit of patience to let the cleaning solution break down the molecular bonds of the dirt, you can transform the look of your kitchen or bathroom in a single afternoon.

  1. Clear the kitchen floor first. Remove all furniture, rugs, and items from the floor. Vacuum or sweep thoroughly to ensure no loose grit or debris is trapped in the grout lines, which could cause scratching during the scrubbing process.
  2. Test in a hidden corner. Apply a small amount of your chosen grout cleaner to an inconspicuous corner of the floor. Wait ten minutes, wipe it away, and check for any discoloration or damage to the tile glaze before proceeding.
  3. Saturate the grout lines. Apply the grout cleaner along the lines, working in small sections of about four square feet at a time. Ensure the grout is thoroughly saturated so the chemicals have time to penetrate the porous surface.
  4. Let chemistry do the work. Let the cleaner sit on the grout for 10 to 15 minutes. Do not allow the cleaner to dry completely, as this can leave a sticky residue that is difficult to remove.
  5. Scrub with firm pressure. Use a stiff-bristle nylon brush to scrub the grout lines in a circular motion. Apply firm pressure to lift the loosened grime out of the recessed gaps.
  6. Rinse until water runs clear. Wipe away the dirty residue using a clean, damp microfiber cloth or a sponge. Rinse your cloth frequently in a bucket of clean water to ensure you aren't just moving the dirt around.