Porcelain and ceramic tile is resistant to germs and bacteria and it is also among the easiest of flooring materials to clean. You can clean your porcelain tile with a damp sponge mop. A solution of 1/4 cup of white vinegar to 2 gallons of water works best- allowing time for drying. You can also sweep or vacuum. Although the glaze of a tile is impervious, it is still possible for its surface to discolor from certain chemicals.