Ail Fimet products are produced in compliance with environmental rules and with high quality materials, as per best Italian tradition. The surface of the products can be altered by humid climate with high percentage of saltiness, sour rains, solvents, thermal excursions and exposure to ultraviolet rays. Our products are therefore submitted to sait spray test in order to obtain a reference data for our guarantees. The test is carried on optimal conditions, where the handles are exposed only to sait spray. Therefore, in order to guarantee the resuit obtained, we recommend not to use corrosive detergent and abrasive cleaners or other cleaning products containing muriatic acid when cleaning the handles, but only a plain smooth cloth with water. We recommend also to avoid installing the handles when the room has just been painted, as the exhalation of the varnish can weaken the surface. Rings, keys, and sharp object in general can damage the surface.