You won’t get rid of them. If you are noticing them now, and it is in a building shared with other people, you won’t get rid of them. Yes, they fly. If you’ve been to Hawaii for long period of time you will get buzzed by them. They eat wallpaper glue, and live under the wallpaper. Anywhere you see a bulge may be a place they have been housed and eating. You need to seal with caulk around EVERYTHING along your walls. Pipes, seams, slight cracks, everything. If you see one, you have a hundred. If you see a bunch, you have a thousand. You never see all of them. Try roach powder you can buy at a dollar store. Boric acid. You can also try Diatomacious earth around edges if you want a holistic method. It acts like little shards of glass when they try to walk over it. That can be good around your bed. Any sprays you try will only get the ones you see, and attract more. They usually have an attractant in them and more roaches will come and you will have to spray more. Then you will smell that stuff. Your best bet is a bug bomb you can buy in 3 packs at Walmart. Set one off and leave for the day. Change your bedding, wash counters, wipe off cans, throw out open food containers. It gets into everything. Don’t leave any crumbs or food anywhere, no open boxes, no closed boxes. Put your cereal boxes in the fridge. Anything not air tight sealed should be in a container or the fridge. You won’t get rid of them. They will outlive you and me. You can cut off a head of a roach, and it will not die until it starves. Of course, don’t try it, that is cruel. Just live clean and buy Tupperware containers you keep sealed all the time. They may even have eggs in your food. I’m not trying to scare you, I’m just telling you that you need to throw out anything open, and seal everything else up. It is a tough battle, and I don’t envy you at all. I would rather have mice. At least then I know there are only 5 or 6 instead of thousands. Sorry to be the bearer of such good thoughts lol. I’m just being real with you.