Humidifier runs but there is little or no visible humidity output; room humidity does not increase.

Safety first: Turn the unit off and unplug it before opening.

• Check water level: Ensure the water bottle is full and properly seated so the base reservoir fills to the correct level.
• Inspect the wick: Remove the wick and examine it. If it is stiff, discolored, or has a chalky coating, replace it with a genuine Essick Air wick designed for your model.
• Clean the base: Remove mineral buildup from the reservoir with a vinegar solution and rinse thoroughly.
• Clean the fan and grilles: Dust buildup can reduce airflow. Vacuum or wipe the intake and exhaust grilles and gently clean the fan blades.
• Set higher fan speed: Run the unit on medium or high to maximize evaporation, especially in very dry conditions.

If output remains low after replacing the wick and cleaning, the fan motor may be weak and require replacement.