I've been having allergy problems lately. I don't know if it's dust or cat dander or my apartment trying to slowly suffocate me or what. So I've been changing the sheets on my bed more often. I've been vacuuming more often. Vacuuming stresses out the cat. When she's stressed out she sheds like mad. Meaning there's more fur lying around my apartment. Which I then need to vacuum up, which stresses out the cat, which causes her to shed...
So I went and bought an air filter.