Repel Flies with a Bag of Water…
Photo by brookage.
Turns out that all you need to deal with an annoyance of a common household fly – is just a plastic bag or two.
Some restaurants for example – have clear plastic bags filled with water hanging from the railings to repel flies.
Question-and-answer web site The Straight Dope gives more detail on why this trick works:
Evidently, houseflies, being highly edible and defenseless, are nervous types, and don’t like to sit still when they see something moving nearby, because it could be a predator. The water bag acts a bit like a lens—try it some time—in which the movements of people in the area are reflected. Even if the fly is too far from the action to see it directly, it can see a shifting of light and dark in the water bag, which it interprets as nearby movement, and it will fly away from the bag.
So, next time you have a fly problem, grab a few plastic bags, fill ’em up with water and hang ’em all around. Enjoy 😉
I am still somewhat reluctant to accept the idea that this trick is actually working.. Has someone actually tried it??
Original article: Repel Flies with a Bag of Water.