Basic cleaning involves a man-made, scratch-resistant, non-porous tile with the original color of grout being a light color without any coatings over the surface. This is the majority of the tile you will find in commercial and residential settings, especially in areas subject to extreme traffic. Before cleaning go to an inconspicuous corner and see if you can scrape any coating off the surface of the grout or tile. Also check and see if you can scratch the surface of the tile with a steel knife – if tile scratches then do not use this process. Place water on the tile and grout and watch for absorption. The water will sit on the surface of a non-porous tile (which determines that you can use this process), but will absorb readily into unsealed and uncoated grout. If water absorbs in to tile, do not attempt the following cleaning process. If water does not readily absorb into grout, then check again for a surface coating. If there is none, then the grout has been sealed and should clean up easily.