1/4cup bleach, 3/4cup baking soda, old toothbrush. I put it on the cracks and let sit for an hr took a brush scrubbed it off didn't have to scrub hard just had to get the harded mixture off and rinsed hot water and my tiles and grout super white
I'm going to have to try this. With tile floors throughout the whole house, keeping the grout clean is a challenge. Hopefully you don't have to scrub too hard. http://media-cache-ak2.pinimg.com/originals/c2/d8/bb/c2d8bb60e63203912e15898b6e8478d3.jpg
Sink run and upper and lower kitchen cabinets painted in Pantry Blue with aged brass Ionian faucet fixtures and drawer pull hardware, pairs beautifully with traditional subway tiles in white on top of dark gray grout for easy cleaning and maintenance.
Homemade Grout Cleaner Safe Non Toxic - 7 cups water; 1/2 cup baking soda; 1/3 cup lemon juice; 1/4 cup vinegar - mix all together in a bowl or bucket; use toothbrush to apply to grout and scrub clean; use dry washcloth to wipe up excess