Use Clorox Cleaning Bleach Gel to clean your grout. Just pour it on the grout and leave it for minutes. Scrub with a toothbrush and let sit for another 5 minutes. Then use water and a mop to clean everything up
Homemade grout cleaner is such a great way to clean tile grout; all you need is C bleach and C baking soda place paste on grout for 15 min. Scrub with toothbrush then rinse . Use gloves, wear old clothes and pen a window.