I lived in a cheap studio in Boston that was infested with roaches. Every 3-4 months I would spray Raid where the walls met the floor and that always worked well until they gradually started appearing again.

I lived in another studio that got a bedbug infestation. My building’s management paid for the place to be heat treated – they wheeled in two giant space heaters and had them powered by a generator on a truck five stories below on the street. I never saw another one again, but it destroyed all my books.

Nowadays I’m way more picky about where I live and I haven’t had any pest issues in over a decade.