I found out late last night that the filters in my AC unit have a fat layer of dust on them… and it's probably what's been causing my respiratory issues the past week. I hadn't cleaned the filters since I moved in to the apartment (~1 year ago). I never cleaned the AC filters of any of my previous apartments (oops), so I didn't know it was a thing. How embarrassing.
How often do you clean your AC filters? I don't mean the deep cleaning you do every 1~3 years (DIY or by hiring a professional), but taking out the filters, cleaning them, and putting them back in.
Edit: thank you everyone for your anecdotes & helpful tips!! Much appreciated. Maybe I'll invest in one of those 3M sheets some of you suggested 😊
by ichigodaifuku88