So I have a quick question for some of you home owners out there. So I live in the barracks. Its pretty much the same as an apartment, in a building with lots of rooms. Anyways, I always keep my room clean. Sweep and mop every day, dont leave food out, take out trash regularly etc.. Anyways I came home last week after work, and I found a medium sized roach crawling up the wall. I immideatly killed it. Ran out to walmart and got some expensive ass stuff. Like a 2 gallon jug of special poison with backpack straps and an electronic hose. I sprayed it everywhere. All the corners and everything. Moved the furniture and all looking for more. Didnt see any. So Its been a little over a week. I been spraying daily and re-arranging my furniture looking for more and havent seen any. Is it safe to say it was a stray? I am in kentucky and its summer. So they are all over the sidewalks and stuff. I see a couple in the hallway too. I have been spraying up the hallway outside too, just as an added layer of protection. I am convinced the nasty shit was a stray that came thru the vent or walked in when i opened the door. So since its been a week, with my searching and spraying and all I havent seen anything. Is it safe to assume it was a stray? What are some preventive measures I can do to keep them out? Aside from keeping clean, because I already do that. I heard even with no food left out they eat our dead skin flakes that humans shed all the time..