- Will it go away if I just clean the chair?
- What species it this?
- Do I have to burn my house down?
- How to avoid them from reappearing?
Wear a mask, clean in an open space, buy and use a dehumidifier, maybe slather some a new paint job on the walls, vacuum more often.
Far as I remember, white - yellow is standard variety and less harmful. Red - black though, that's when you're fucked.
Accepting corrections.