What is the recommended treatment for use on Marazzi ceramic tiles to remove grout and adhesive residues after laying?

After ceramic coverings have been laid, the floors or walls have to be cleaned to remove mortar, adhesive and grout residues from the surface. This is normally done with an acid solution which is left to act on the tiled surface for a short time. After cleaning, floors covered with unglazed products have to be treated to make the surface even more resistant to liquids which may leave stains or dirt. These procedures have to be carried out quite soon after laying, to ensure that floor and wall coverings look and perform to their best.