Got this pesky house fly keep flying into my house. After opening door and window for extended period to let it out, then next day suddenly it appeared in the house again. Looks like it see itself as a permanent house guest already. Apparently house fly only get to live its whole life for around 15 days though. Should I find more ways to get rid of it? Or resigned to the situation of an unwanted tenant who does not pay rent and wait for nature to run its own course?