Cleaning:
•    prevent the material from getting very soiled
•    clean products regularly in warm water with soap solution using soft cloth or sponge
•    rub especially soiled spots with soft brush
•    after cleaning, dry products softly with a cloth

In the case of grime (pen stains) - which cannot be removed using the above-mentioned methods, one can use extraction benzene to wipe the surface:

Do not use: polishes, waxes, sprays, strong detergents,  solvents and   cleaning agents containing solvents,   as well as  cleaning   agents for natural leather. These cleaning agents can cause the material to stiffen and crack, as well as a change of colour and shine of the surface.

Storage: Do not expose to direct sunlight, protect from moisture, frost and high temperature.