2 ways: 1) Mr. Clean Eraser (a bleach product) or 2) White vinegar and baking soda with a toothbrush. Make a paste with approximately 1/2 cup vinegar and 1 cup baking soda. Let paste sit on grout for about 10-15 minutes after you have scrubbed it in with toothbrush. You don't have to scrub hard – just cover the grout well. Rinse off with water. I often just leave it until I'm done cleaning the rest of the house and then wash it down. Both work well however, #2 is using natural products and takes just a little more time. Happy cleaning!


