Your tile floor has to have lines of grout in it to help hold the tiles in place. Since the grout lines are usually slightly lower than the tiles, all kinds of stuff can get stuck in there that can make the grout dirty and it can be really hard to get the grout nice and clean just when you are cleaning the floor. That dirty grout can make your tile floors look dirty, even when they are clean. So, you want to make sure that you can get that grout nice and clean. What are some things you can use to do that?
Baking Soda and Hydrogen Peroxide
One thing that you can do is to make a nice thin paste of some baking soda and hydrogen peroxide. When you have that paste, you rub it on the grout. Let the paste sit for a few minutes, and then grab a toothbrush, preferably one no one in your family uses, unless that family member has annoyed you lately. You use that toothbrush and scrub the grout. The baking soda is mildly abrasive, which helps it get that stubborn dirt up, while the hydrogen peroxide acts as a mild bleach, making the grout nice and bright. You can add in some dishwashing liquid as well, which can help cut any greasy dirt that may be stuck in your grout. Don't put the paste all over the floor at once, just work in smallish areas. You can put the paste down on the next area of grout you are going to work on while you are cleaning one area to allow the cleaner to sit and do its work.
Commercial Cleaning Solutions
There are also commercially prepared cleaning solutions that you can purchase and use. Some of these cleaning solutions are designed for you to use in various machines when you are cleaning the floors, while others are just fine for you to use to scrub the grout by hand. You will generally want to let the cleaner sit for a little while, and then clean it up. When you are done, you will want to mop the floor to make sure that you get all the dirt and chemical residue off the floor.
If you don't like the way that the grout on your tile floor looks like, there are various products and mixtures that you can use to perform grout cleaning.