The use of adhesive and cement during application produces residue on the surface which is not visible to the naked eye. This residue creates a highly-absorbent film on top of the ceramic tile and, over time, this will become much more difficult to clean.
It should be cleaned with HG Acid (available at DIY shops such as AKI, Maxmat or Leroy Merlin) or DETERDEK from FILA (sold by construction materials suppliers) in the concentrations recommended by the manufacturers.
How to make a floor plan:
With the help of a tape measure, measure the long side and the short side of your bathroom.
Create a simple drawing and write down the measures.
Also add structures: doors, windows and sanitary items.
If you want you can also add measures for doors and windows and their distance from the wall.
If you want to remove any sanitary ware please mark with an X.
The more information you add, more accurate your bathroom will be.