180, you might just have to resort to the scorched earth plan! When we got field mice in our garage and home, I just set those newer (tray) type snap traps. They have a yellow plastic tray that looks like a piece of cheese that I put a dab of PB right near where the trip pin sets into the fake cheese tray. Works every time, they come up from three sides (I put it where they pretty much have to come up to it from the front or sides) and they put their paw on the tray, and we remove the carcase and reset it. Haven't had one smarter than us yet.