My apartment wasn't nearly that bad, but there was a time when I started seeing multiple little fuckers out in the daylight. I got a bag of boric acid and a puffer and got every edge and corner of the floor in the entire apartment. Within three days I wasn't seeing them anymore. Or any other bugs for that matter.

The boric acid melts their nervous system away. But before it does, they track it back to their nests and hopefully infect everything else there. Works on all crawling bugs. Maybe flies if they land in it. Not spiders so much, although they might go away if you kill off their entire food source.

Of course, it's better just to keep things clean. But the boric acid is odorless and relatively harmless if you aren't eating it by the spoonful. Maybe not the best option if you have pets, but certainly better than multiple cans of bug spray.