Tile and grout can really add to the look of a space. However, in order for it to make the right statement, the tile needs to be in great condition and both the tile and the grout need to be nice and clean. Here is more on tile and grout cleaning, as well as some other info.
Tile should be gently cleaned regularly
You want to stay on top of cleaning the tile regularly to prevent it from looking dull and getting a stubborn build up on it that's hard to remove. For the tile in your kitchen, you can wipe it down each time you load the dishes in the dishwasher or are taking care of other kitchen chores. For tile in the bathroom, you want to wipe down the tile after each shower, so you don't end up with soap scum that is hard to get off. By getting in the habit of wiping it down at a specific moment, you won't end up forgetting.
No matter how good you are at regularly cleaning the tile, you should realize that professional tile cleaners should still come out periodically. When you have professionals clean the tiles, they will be able to get rid of anything on the tiles that you have been missing or that's stuck on there good.
Grout can be hard to keep looking good
The grout has some things going against it that make it harder for you to keep the tile area looking as nice as you would like. When you clean your tile, you should also go over the grout. However, the rough texture of the grout causes things to stick to it. This will cause the grout to look dirtier and even end up with staining. You should use a toothbrush and a cleaning solution to clean the grout as good as you can once you notice it is starting to look dingy.
Another important reason for calling out a professional tile and grout cleaner is they will really be able to get the grout clean. They can get rid of the dirt and bacteria, as well as any staining that's in it. Also, it is common to have issues with mold and/or mildew in the grout, especially in some places like the bottom corners of your shower.
Another great thing about having professionals come to clean the tile and grout is they will be able to warn you of anything that may be potentially problematic. Since they are the tile and grout experts, they will recognize the warning signs of problems to come and give you advice on the best way to proceed in preventing such issues.