To clean grout, make sure the room is well ventilated, and apply bleach to the grout lines with a brush. After allowing the bleach to sit, scrub again to remove set-in stains. Apply a baking soda solution, and then mop the floor thoroughly.
- Open a window
Ensure that the area is well ventilated. Open a window, or circulate the air with a fan.
- Dress in old clothes
Dress in old clothes in case they come into contact with the bleach. Direct contact with bleach alters the color of fabric.
- Apply bleach to the grout lines
Use a scrub brush to apply bleach to all of the grout lines. Using a scrub brush, scrub the bleach into the grout lines.
- Allow bleach to sit
Leave the bleach to sit for up to several hours, depending on how badly the grout is stained.
- Scrub the grout lines
Once again, using the scrub brush, scrub all the grout lines. This time, use hot water.
- Apply a baking soda solution
Apply a layer of baking soda mixed with water to the grout lines. This helps eliminate the smell of bleach and whiten the grout.
- Mop the entire floor
Mop and rinse the entire floor thoroughly.