How to Deep Clean Tile Grout

Grout is the unsung hero of your kitchen floor, working tirelessly to hold your tile in place while quietly absorbing every spill, splash, and crumb that falls its way. Over time, that porous cement base collects oils and grime that a simple mop just pushes around, leading to that stubborn, darkened haze that makes an otherwise clean kitchen look perpetually dingy. Restoring your grout to its original color doesn't require a professional crew or toxic chemicals. With the right combination of agitation and the correct cleaning agent, you can pull the embedded dirt out from the pores of the grout, leaving your floor looking crisp and uniform. Done well, this job transforms the entire aesthetic of your room without costing more than a Saturday afternoon.

  1. Clear the workspace completely. Remove all movable furniture, rugs, and appliances from the tiled surface. Sweep or vacuum thoroughly to ensure no loose grit remains, as this can scratch your tiles during the scrubbing process.
  2. Saturate grout lines thoroughly. Spray your chosen grout cleaner generously along the grout lines, working in small sections so the solution doesn't dry out. Let the product sit for five to ten minutes to allow the chemical reaction to break down the surface oils.
  3. Attack embedded dirt aggressively. Use a stiff-bristled grout brush or an old toothbrush to scrub the lines with firm, circular motions. Work the bristles deep into the grout to loosen the embedded dirt that the chemical has softened.
  4. Remove every trace of cleaner. Use a clean microfiber cloth or a sponge to wipe up the dirty liquid immediately after scrubbing. Follow up with a damp mop or cloth to ensure all traces of the cleaner are removed.
  5. Ensure complete bone-dry finish. Go over the entire floor with a dry towel or microfiber mop to soak up any remaining moisture. Grout must be completely bone-dry before you can move on to sealing.
  6. Lock in the clean permanently. Apply a penetrating grout sealer using an applicator bottle or a small foam brush. Let it soak into the grout for the time specified on the bottle, then wipe off any excess sealer that landed on the tile surface.