I like our Honeywell Insight. Looks OK, is quiet enough and most importantly: Has readily available generic HEPA filters. I use it for fire season, it makes a noticeable difference to me re: wildfire smoke in my house.

It’s all going to be copyrighted but CSU’s extension is phenomenal:

https://extension.colostate.edu/topic-areas/agriculture/

Now available as a .stl file!

Toothpaste with hydrated silica might polish it off with enough elbow grease. Should be gentle enough to not fuck with the polycarbonate lens itself. I’ve done it with success but the toothpaste I used was an institutional brand and not really fit for putting in one’s mouth.

Commercial toothpaste with hydrated silica would be marketed as “microbeads” or some such.

shit fire and save matches

If a frog had wings it wouldn’t bump it’s ass when it jumped.

I’ve heard these used when someone says something nonsensical, just as a completely worthless reply.

Worst case Ontario!