I live in an apartment, and they spray for bugs periodically. I don't know how often they come, but I can tell it works sometimes. The bug guy is really good about staying away from my animals and my cricket tank, apparently.. but occasionally I find dead little crickets along the walls in my bathrooms. I'm sure that is what got to them.. so maybe you can get some of the stuff the bug pros put down and just go around the walls in that particular room. If you get the same stuff, it doesn't smell, and it's harmless to other animals once it is dry (I've asked!!!).
I never have roaches (the one's you don't want) and I rarely find spiders or beetles (usually the cats find those, anyways) but I have also never had any adverse reaction inside my cricket tank or to any of my animals. So, it must be safe.