Grout, the mixture of water, sand, and cement that keeps tiles in place, can be difficult to keep clean. Grout lines easily pick up dirt and stains, and before you know it they turn from white to black.

Do a preliminary clean. Before you get down to the deep cleaning methods, it is necessary to do a regular clean up of your tile.

In a bucket mix 7 cups of warm water, 1/2 cup of baking soda, 1/3 cup of ammonia, and 1/4 cup of white vinegar. Allow all the ingredients to mix completely, so the baking soda is dissolved.

Fill your spray bottle completely, and then shake the solution well. Work small areas at a time : 4 ft x 4ft is ideal- Spray your cleaning solution over the grout so it is dampened. Allow the mixture to set for 3-5 minutes to work into the grout.  Work small areas at a time

Use a scrubbing brush of your choice – a hard bristled cleaning brush, a toothbrush, or a magic eraser are all good options. Put some hard work into your scrubbing to get the ground-in dirt out from between your tiles. Use a damp cloth to wipe excess dirty liquid of your tiles, and wring it out into a separate container.  Repeat process if needed.

Use the above process to move onto the rest of your grout, giving all it a thorough cleaning

When you are convinced your grout cleaning is finished, do a second clean up of the entire area. If you were working on counters or in a bathroom, use a generic cleaning spray and rag to wipe down your tiles.  For floors, go ahead, mop your tiles again, and towel dry.