Viridian DecorMirror™ has increased resistance to a number of cleaners and adhesives, although some cleaning solutions (specifically ones containing acid or ones which are strongly alkaline) can damage the mirror coating.
A recommended method is to apply methylated spirit sparingly onto a damp cloth. Use a lint free cloth to polish the surface dry. Be careful to ensure no abrasives are present on the cloth and ensure no contact is made with the silver backing. Specific care should be taken to avoid excessive cleaning of the edge of the glass, and that moisture is kept away from the painted surface of the mirror.