10SECTION 5 MAINTENANCE5.1 CLEANING YOUR FIREPLACEYou can clean the exterior of the heater with a soft, damp, lint-free cloth. Do not use cleaning or polishing products.WARNING:Before cleaning the exterior of the appliance, disconnect the unit from the power supplyand leave until cooled off.The window panel may become dirty or dusty. Dust can be removed by lightly rubbing the surface with a clean, lint-free clothor paper towel. To remove fingerprints or other marks, use a soft, damp, lint-free cloth with a mild household glass cleaner.The front window panel should always be completely dried with a clean, lint-free cloth or paper towel.Storage: When not in use, unplug the unit from the power supply and store in a dry, dust-free location.CAUTION:Do not use abrasive cleaners on the window panel.Do not spray liquids directly onto any surface of the unit.WARNING:An authorized service representative should perform any other servicing.WARNING:Before cleaning the exterior of the appliance, disconnect the unit from the power supplyand leave until cooled off.Do not remove back panel. Any tampering with main back panel voids warranty.Only small panel should be opened to replace flame bulbs.Risk of electrical shock may cause severe injury or death.Any tampering with back panel voids warranty.5.2 CLEANING THE FRONT WINDOW PANEL