- 1). Mix together 1/2 cup oxygen bleach with 1 gallon of warm water and stir it until it dissolves. Oxygen bleach is a color safe cleaner that lets the chemical reaction of oxygen break up the stains.
- 2). Pour the mix on the grout lines and let it soak in for half an hour. This will allow the bleach to do its work.
- 3). Scrub the grout with a stiff-bristled scrub brush. Use more solution to add more fluid and help with scrubbing if the first application has soaked in.
- 4). Mop the floor to remove the dirt and cleaning solution.
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