The battle with cockroach

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Actually there are not many cockroach in my room and they don't do great harm to me. But I don't like them. When I draw the drawer it may be flash across and startles me very much. And their appearance is really ugly, I don't like they across anything I have. I will pour boiling heat water to heating in winter and I will grab a fly swatter whenever I found one. And I conceal all my foods. There are only several cockroach but I know it is an endless battle. Are you annoyed by cockroach and do every thing to get rid of them?