Dehumidifier or humidifier emits a musty or moldy odor during operation.

Safety: Unplug the unit before cleaning. Avoid inhaling mold spores; consider wearing a mask and gloves.

Steps:

• Clean tank and tray: Wash the water tank and any internal water trays with warm soapy water, then disinfect with a mild bleach solution (rinse thoroughly).
• Clean or replace filter: Remove the air filter and clean or replace it according to the manual.
• Dry internal surfaces: After cleaning, allow the unit to dry completely before reassembly.
• Regular maintenance: Empty and dry the tank daily in humidifiers and clean the dehumidifier tank regularly to prevent regrowth.