Before servicing or cleaning the unit, switch power off at the service panel and lock the service disconnecting means to prevent power from being switched on accidentally. If the service disconnecting means cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel. For quiet and efficient operation, long life, and attractive appearance, lower or remove grille and vacuum interior of unit with the dusting brush attachment. To clean the grill, don’t put it into hot water. Use non-abrasive kitchen detergent then wipe dry with a clean cloth. The grille should be dry after cleaning before reattaching to the fan motor. Using a cloth dampened with kitchen detergent remove any dirt from the fan body then wipe dry with a clean cloth. The motor is permanently lubricated and never needs oiling. Never use gasoline, benzene, thinner, or any other such chemical for cleaning the ventilating fan. Do not immerse the motor in water when cleaning. Do not soak resin parts in water over 140°F (60°C).