Musty or moldy smell from the dehumidifier during operation.

Safety: Unplug the unit. Avoid inhaling dust or mold; consider wearing a mask and gloves.

Steps:

• Clean tank: Remove the water tank and wash with warm water and mild detergent. Disinfect with a diluted bleach solution (rinse thoroughly afterward).
• Clean tray: Access the evaporator drain tray and wipe away slime and deposits. Use a mild disinfectant safe for plastics.
• Filter: Wash or replace the air filter. On hybrid units, replace the humidifier evaporative filter if it smells or is discolored.
• Drying run: After cleaning, run the unit in fan‑only mode (if available) for 30–60 minutes to dry internal surfaces.