Porcelain floor are very popular because they are easy to keep clean, but they can easily get stained if not cleaned properly. One of the most common problems with new porcelain tile floors is the appearance, shortly after laying, of stains or, what is worse, shoe prints which can be seen against the light and cannot be removed even by washing the floor.
This is usually due to the presence of concrete and grout residue on the surface. This residue forms an even surface film which does not appear as "dirt" but is sensitive to acid substances like almost all beverages.
Removing grout and concrete residue from porcelain and ceramic tiles
Immediately after the floor is laid, it is important to wash the floor with a specifically designed detergent like DETERDEK PRO to remove all residue of grout, mortar and glue. This can also be done by the home owner. Follow the instructions on the label.