Had no clue about this (Page 2 ) | June 28, 2025

4. How This Trick Works in Just 5 Minutes
Setting up this trick is incredibly quick and easy. All you need is a clear plastic bag, water, and a few shiny coins. Fill the bag about halfway with water, drop in the coins, and seal it tightly. Then, hang the bag in a strategic location where flies are a problem.
Within minutes, you’ll notice a significant reduction in the number of flies in the area. The reflective properties of the water and coins create a visual disturbance that flies find disorienting, effectively keeping them away without the use of harmful chemicals or unsightly traps.
5. Zero Effort Required: The Science Behind It
The science behind this trick lies in the unique visual system of flies. Flies have compound eyes, which are made up of thousands of tiny lenses. This gives them a wide field of vision but also makes them sensitive to light and movement.
The water and coins in the bag create a kaleidoscope effect that refracts light in multiple directions. This confuses the flies’ vision, making it difficult for them to navigate the area. The result is a simple yet effective deterrent that requires no ongoing effort or maintenance.
6. Materials Needed for the Trick

To implement this trick, you’ll need the following materials:
– A clear plastic bag (preferably a sandwich or quart-sized bag)
– Water (enough to fill the bag halfway)
– Shiny coins (3-5 coins, such as pennies or nickels)
– A string or twist tie for hanging the bag
All of these materials are inexpensive and easy to find, making this trick accessible to anyone looking to keep flies away.
7. Step-by-Step Guide to Implementing the Trick
1. Gather your materials: a clear plastic bag, water, shiny coins, and a string or twist tie.
2. Fill the plastic bag halfway with water.
3. Drop 3-5 shiny coins into the bag.
4. Seal the bag tightly to prevent any leaks.
5. Use the string or twist tie to hang the bag in a location where flies are a problem, such as near a door or window.
That’s it! In just a few minutes, you’ll have a fly deterrent that works without any further effort on your part.
8. Real-Life Success Stories
Many people who have tried this trick have reported great success. One reader, Sarah from Texas, shared that she used this method during a family barbecue and noticed a significant decrease in the number of flies around the food. Another user, Tom from Florida, mentioned that he hangs these bags in his garage and has seen a noticeable reduction in flies entering his home.
These real-life success stories highlight the effectiveness of this simple trick, proving that sometimes the best solutions are the ones that have been passed down through generations.

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