Stirs up more dust that even the top of my shark gets dusty right after I wipe it down. Terrible for people that are allergic to dust.  Good on VOC’s and great smelling air except you can enjoy smelling the air without inhaling a bunch of dust. I did everything I could.  Even turned the filter upside as it was suggested, cleaned the sensors, still nothing. It never detects PM10 even if I’m shaking something dusty behind it.  Wasted my money on this purchase.