Corsi-Rosenthal Box

diffusing anything, sprspaying anything, just contributes to placing particulates into the air. bad for indoor air quality..it all builds up esp. in enclosed spaces. ( ask an aerosols engineer if you don't believe me.) get a hepa filtration appliance / air purifier or make your own Corsi Rosenthal box. you want clean air, clean air doesnt smell...these appliances provide filtration down to reduction for particles from 0.5 to 2.5 micrometers (μm), including the DIY box noted above. used in classrooms during pandemic because economical. The added plus? improves indoor air quality against viruses, wildfire smoke, cooking fumes, etc.   you can even search corsi rosenthal on reddit...

If you don’t want to DIY: https://www.cleanairkits.com/ has some silent options with PC fans. You could obviously source the fans yourself and make a frame if you had the tools.

Get you one that you can run all the time and is actually effective. These kits use PC fans for super low power and low noise filtration: https://www.cleanairkits.com/ Add it to a smart outlet if you want to turn it off. But it is so quiet and efficient you may just leave it on. It only needs “one speed”, and has no power switch. This air quality sensor works great with HA so you can see how much you need to filter: https://www.airgradient.com/indoor/

Do your research - many of the consumer grade air purifiers that you can spend a lot of money on, aren't anywhere near as good as they claim. I built a Corsi–Rosenthal Box in time to allergy season last year and had the least amount of hayfever problems ever. Cheaper than anything I could purchase too.

Both of yall should check this out if you haven’t seen it: https://www.cleanairkits.com/?srsltid=AfmBOorjw-EQpTQ_p33h__ubXLWcMDzpcqvu8tlSwgDNYHGh469c1UNj Is the Corsi-Rosenthal box style but with a little more polish so it looks good.

I still love my Corsi Rosenthal air purifier.  Its on an Alexa plug and turns on at night in my living room. 

If i wanted to upgrade from my CorsiRosenthal, this is where I'd start. https://www.cleanairkits.com/

Coris rosenthal or the Coway filters. Don't just run them now, run them all the time. Great way to remove dust, allergens, and viruses from the air.

I've bought a couple of Luggable air filters from [Clean Air Kits](https://www.cleanairkits.com/) that seem to work really well. They're tall but skinny. They're built with computer cooling fans, so they move huge amounts of air very quietly. And they use the same Filtrete MPR1900 filters that you would use in a furnace/central air system.