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Pennies In Bags of Water Make Flies Flee. Some have said it magnifies the pennies resembling another insect's eyes, scaring the fly away, while others say the clear liquid looks like the surface of a body of water, which the flies perceive as a place they don't want to land.
Similarly, you may ask, do pennies in a bag keep flies away?
Keep Flies Away with Water and Pennies. The bags were half filled with water, each contained 4 pennies, and they were zipped shut. The owner told us that these baggies kept the flies away! We actually watched some flies come in the open window, stand around on the window sill, and then fly out again.
Secondly, do bags of water keep flies away Mythbusters?
Bags of water hung from the ceiling can repel flies. This myth is based in the theory that refracted light in water confused flies' compound eyes. The first chamber would hold the flies, the second would hold some rotten meat, and the third would hold both rotten meat and a bag of water.
Natural fly deterrents Flies hate the smell of essential oils like lemon grass, peppermint, lavender and eucalyptus – put a few drops in a spray bottle and use around the house daily. They also hate the smell of camphor (a traditional moth deterrent) which you can buy online, cloves and cinnamon.