251321792000 A42 Network Camera Quick Start Guide [y = You can clean the devise body with fast dry cloth, and for stubborn stains, use the cloth with mild detergent. To avoid possible damage an device body coating which could cause performance decrease, do not use volatile solvent such as alcohol, benzene, diluent and 5o on to clean the devise body, nor can strong, abrasive detergent be used. « Dome covers an optical component.