In this case it is important to clean your area with a microfibre cloth dampened with clean water, and to use a vacuum with a true HEPA filter. The room should be kept scent free (even the containers of scented products should be stored elsewhere), and as free as possible from dust collecting items such as fabric curtains, upholstered furniture, carpets, collectibles, etc.
Then give the room a thorough air-cleaning by running the air purifier on high for a couple of hours with no one in the room and the door closed; then turn the air purifier on low setting for another 2 hours with the room unoccupied and the door closed. When you re-enter the room, you can either keep the machine running on low or turn it off, depending on your comfort level. Keeping the door closed most of the time can help to keep out pollutants from the rest of the house.