We went with friends to a restaurant on Sunday for lunch and sat in
the patio section beside the store. We happened to notice zip lock baggies
pinned to a post and a wall. The bags were half filled with water, each
contained 4 pennies, and they were zipped shut. Naturally we curious!
The owner told us that these baggies kept the flies away! So naturally we
were even more curious! We actually watched some flies come in the
window, stand around on the window sill, and then fly out again. And there
were no flies in the eating area! This morning I checked this out on Google.
Below are comments on this fly control idea. I'm now a believer!

Zip-lock water

# 1 Says:
I tried the zip lock bag and pennies this weekend.. I have a horse
trailer. The flies were bad while I was camping. I put the baggie with
pennies above the door of the LQ. NOT ONE FLY came in the trailer.
The horse trailer part had many. Not sure why it works but does!

# 2 Says:
Fill a zip lock bag with water and 5 or 6 pennies and hang it in the problem area.
In my case it was a particular window in my home. It had a slight passage
way for insects. Ever since I have done that, it has kept flies and wasps away.
Some say that wasps and flies mistake the bag for some other insect nest and
are threatened.

# 3 Says:
I swear by the plastic bag of water trick. I have them on porch and
basement. We saw these in Northeast Mo. At an Amish grocery store
and have used them since. They say it works because a fly sees a reflection
and won't come around.

# 4 Says:
Regarding the science behind zip log bags of water? My research
found that the millions of molecules of water presents its own prism effect and
given that flies have a lot of eyes, to them it's like a zillion disco balls reflecting light, colors and
movement in a dizzying manner. When you figure that flies are prey for many other
bugs, animals, birds, etc., they simply won't take the risk of being around that much
perceived action I moved to a rural area and thought these "hillbillies" just
yanking my city boy chain but I tried it and it worked immediately! We
went from hundreds of flies to seeing the occasional one, but he didn't hang around long.
I have done that for the past three years here in Minnesota and have everyone at the
campgrounds doing it. Even in the outhouses. It really does work!!!!!

PS. The water never needs to be changed as long as it doesn't evaporate. My Mom leaves hers up
all year and lets it freeze in the winter and when it melts in the spring it still works. I use more than four pennies, but I have
always been a big spender. I usually put in 8 - 10. No more flies for me!