my room is pretty messy, probably the messiest in my house, and I swear to god I have never once seen a cockroach in my room. It's not dirty with food or anything...just dust and whatnot...But I have never seen a cockroach in my room. My mom has seen one in her room and so has my sister, but never for me. :/ Are they repelled by incense or smoke in general, because I always have something burning in my room. Maybe that's why I never see them in there?