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Allow the unit to dry for 24 hours prior to operating it to minimize the risk of damaging the circuit board. • Do not put any foreign objects into the unit or water reservoir • Clean the exterior of the unit with a soft cloth and a mild soapy water solution only • If the unit becomes noisier as it gets older and/or the airflow becomes less robust, try cleaning the fabric water curtain and pre-filter • Make sure the unit has adequate ventilation around it to ensure airflow both into the rear