Humidifier has a persistent musty or moldy smell

Safety: Unplug the unit and empty all water.

• Deep clean tank: Fill the tank with a solution of 1 part white vinegar to 3 parts water. Let sit for 30 minutes, then scrub with a soft bottle brush and rinse thoroughly.
• Clean base and tray: Wipe all wet surfaces in the base with vinegar or a mild unscented disinfectant safe for plastics. Do not get liquid on the control electronics.
• Replace filter: For evaporative models, replace the filter cassette if it smells musty or shows visible mold.
• Dry between uses: When not using the humidifier for more than a day, empty the tank and base and let them air dry to prevent regrowth.