Boot that pine that you have hanging from the rearview mirror. Instead, connect an air purifier made by Frieq ($ 20) into the outlet (what we used to call the lighter) to improve air quality, neutralizing bacteria, dust and pollen.
If you have a large vehicle, the powerful Philips GoPure Compact ($ 144) uses a filtration system that removes smoke, pollen, harmful gases and other irritating substances. It is a small device (less than three pounds) that is attached to the dashboard or behind the seat, and the filter lasts approximately one year.