To clean use a mild/neutral soap and water and dry it immediately with a clean soft cloth. 

Use any common neutral detergent, provided it does not contain neither chlorine nor chlorine derivatives, such as bleach and muriatic acid, ammonia and vinegar.

Do not use any abrasive materials that would unavoidably scratch the surface.

Do not use stain removers, diluent, acetone, trichloroethylene, vinegar, ammonia, bleach, limescale remover, as well as liquids containing such substances and do not use any abrasive powder detergents, capable of damaging the aesthetic and surface finish look.

Avoid shocks and etchings by using blunt items capable of scratching the surface, subsequently removing its protective top layer. Avoid any deposit and prolonged retention of liquids to prevent long-lasting stains and marks from forming. Any liquids must be removed as soon as possible; Do not drag any object on the metal surfaces and do not insist to clean a single area (it may alter its color and texture). Do not put the metal surfaces in contact with high temperature objects as that may cause deformations and yellowing.