It is recommended that environmental dust and bird droppings are cleaned off the Covet Ever Art Wood® surface on a regular basis to keep the surface in good condition. Clean with clean water via a hose or pressure washer (i.e. Karcher) at no closer than 1 meter to prevent mechanical abrasion. For stubborn marks try a non-abrasive cloth (i.e. sponge or microfiber and a well diluted neutral detergent) please consult the supplier. Coastal projects (i.e. within 500mtrs of a saltwater environment) should be hosed down with clean water at least every 3 months