Blueair filters cannot be cleaned or washed. They need to be replaced every 6 months. Please check your user manual to see replacement indications for your model. All user manuals can be found in our Customer Support section.
Blueair pre-filters can be cleaned (vacuumed, or cleaned with your laundry > please check your manual). The pre-filter is the colored textile filter that you place on the outside of your unit (only available for the Blue Pure series).