The wick filter may develop a white/yellow buildup or slight odor after some use. Mineral deposits and other debris, that originated in the water used to fill the humidifier, that have been trapped by the wick filter cause this buildup and staining 

 Your wick filter should be cleaned once a month following the below steps. 

• Remove the wick filter from the filter cage and rinse the wick filter under running water to quickly remove residue. 
• For a deeper clean, soak the filter in a mild or acid cleanser. 20g citric acid for every 1L of water for 1 hour. After soaking, rinse well under running tap water according to the instructions in the user manual. 

The wick filter should be replaced every 6 months. It should be cleaned weekly when in use according to the instructions in the user manual to maintain optimal performance. 

 Important! When the wick filter is replaced, the Filter Expire Indicator must also be reset. To reset your Filter Expire Indicator: 

• Extra long-press the fan speed button for about 15 seconds until LEDs on the interface light up, then release.If done correctly, the wick filter replacement indicator will blink three times and then disappear 

The water tank on the device can be cleaned either in the sink by using tap water and a mild detergent, or by placing in your household dishwasher. Wipe the water tank dry before reassembling. 

The water tank should be cleaned once a month. 

Humidity readings may differ slightly between your Blueair humidifier and other hygrometers. There are many factors that can affect the humidity reading, humidity sensors can vary by ±5% or more depending on: 

• Sensor quality 
• Placement (near windows, vents, or doors) 
• Height from the floor 
• Proximity to the humidifier output 

For best accuracy: 

• Place sensors away from direct airflow 
• Avoid placing them right next to the humidifier 
• Allow several hours for readings to stabilize after adjustments 

Small differences between sensors do not necessarily indicate a performance issue. 

The Blueair team is always working to improve our products and customer experience. To make sure your product ha sall of the latest firmware updates, please connect the device to wifi using the Blueair app. When firmware updates are available they will be automatically sent to all connected devices.