The third stage is a grout of the seams.

The third stage is a grout of the seams. At the final stage, the resulting seams between the tiles are undermined. You can proceed to this work by waiting for the complete drying of the glue and after removing the crosses from the seams. Grout on the tile is performed in the seams diagonally. It rubs up as if inside the seams. After the grout dries, all the remains are cleaned from the surface of the tile. To do this, use a dry rag, and then proceed to wet cleaning.