https://athomeinspections.net/2021/12/what-is-the-best-way-to-clean-tile-and-grout/

Cleaning them, and grout inside the tiles isn’t easy. The popular YouTube channel TileCoach provides the best approach to wash grout and tiles.

A professional cleaner is your best choice for cleaning grout and tile. They are able to provide the proper equipment to provide the three things tiles as well as grout should clear of stains: heat pressure and suction. Professional alkaline tile and grout cleaning solutions are sprayed to loosen up the dirt. Hot, pressure-saturated water will lift dirt and grime. It does this by sucking up the mess to make sure it doesn’t get caught in grout.

Mopping could make tile and grout appear better but only for the short term. Mopping can lead to grout get contaminated due to polluted water. The grout holds onto the filthy water and makes it discolored and moldy over time.

After a professional cleaning wet mopping will help the grout and tile look nice. If your tile is made out of porous materials like natural stone, it needs to be protected by sealing. They should be sealed every 1 to 3 years. The grout should be always sealed by a professional. This can be done immediately following a professional clean.
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