Wet areas such as wash basins, shower cubicles, fittings, sinks, cast mineral bathroom furniture, bathtubs, windows, glass facades, solar panels, bathroom ceramics, polished porcelain stoneware, doors, toilets and partitions - especially in public areas - require special hygiene and thus nano-protection against limescale, graffiti, microbial infestation and vandalism. A protection by a lasting nano-ceramic coating for glass and ceramics facilitates the cleaning, protects against scratches and wear and tear and preserves the value of the surface permanently. Hard dirt deposits from water marks on glass and ceramics, mold in the joints of the wet prone cells, as well as athlete's foot can be fought on a long-term basis. They behave like invisible PTFE coatings, but can be manufactured fluorine-free (PFC-free).