How do you keep hold of flies out of your house?
Keep the door close, fix the hole contained by the screen, and find what ever died in the house and thow it out. i bought a mistifier and put within fly killer(from a farm supply store) and even a wasp will stay out
they make these double sided peices of sticky strips you put on your window, the baby flies will stick to them and die before they can acquire big and annoying; the big bugs will stick to them too.
Open and close doors quickly other then that.
Answers: I went to a restaurant and they put baggies of water hard by doors so that the light shows through them. I don't know what they do to the flies but there wasn't a single one surrounded by the restaurant. I think it has something to do beside the way their eyes see through them.
keep your doors closed dumbo! grasp a big azz fly swat