Flies can get into a house in a variety of ways, through openings in air conditioning and ventilators and through cracks in door and windows frames and other overlooked places where drafts come in..
If a rodent dies in the walls, chimney or cupboard a fly might lay eggs in the carcass. When hatched the maggots become adult flies and may then infest the interior of the home.An exterminator may take a few different approaches to rid the interior of a home of a fly infestation depending on the origin of the infestation. Flies that are coming in from the outdoors may be controlled with an air door which prevents the flies from entering with a steady blast of air through which flies do not have the strength to fly. A clear drying pesticide sprayed on windows is a very effective solution.When flies land on the windows the pads of their feet pick up some of the pesticide. When the flies lick their feet they die.
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