A Fly Went By and Continued On Its Way...DIY Natural FLY Repellent!

2 Materials
5 Minutes

A Simple DIY to Rid Your Outdoor Space of Flies.

No Sprays. No Chemicals.

No Bug-Zappers. No Swats.

Cheap to Do. Pennies. Really.

Just a Simple Hanging Bag of Water!

But Exactly How Do No-Fly Water Bags Work?


Flies have a highly sensitive array of eyes which allow it to see in multiple directions at once. The insect’s head mostly consists of a pair of large complex eyes, each of which is composed of 3,000 to 6,000 simple eyes. These eyes can’t move or focus on objects like human eyes, but they provide the fly with a mosaic view of the world around them. A housefly bases its sense of direction on the direction sunlight comes from. Some entomologists believe that when these complex, sensitive eyes experience refracted light, the insect becomes confused and flies away.

Now that You Know How Water Bags Work…In Theory…Whip Up a Few Water Bags to Cover Your Outdoor Space to Have it be Fly-Free.

What You Need:

Quart Freezer Plastic Bags.  LINK.


Fishing Line.  LINK.


First – Poke a Hole in the Top Thick Closure Section of the Bag. Gallon freezer bags are thick and work great.

Next, fill the bag 3/4 full with water.

Drop in 3 shiny pennies.

The pennies will SINK to the bottom of the bag.

Carefully zip the bag seal to close tightly.

Now bring the water bag outside.

Slip the fishing line into the top hole of the bag. Loop and make a strong knot.

Hang in areas with the most sunlight and where you want to be Fly Free.

The bag swinging gently works best to get the biggest reflection.

Now Sit Back and Enjoy Spring! Flies Be Gone! Fly Free!

Resources for this project:

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Doodle T and Me!
Want more details about this and other DIY projects? Check out my blog post!

Frequently asked questions

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  • Gen50780641 Gen50780641 on Aug 02, 2021

    this is more of a comment than a question ,,,,,,,,,, I tried this exactly as you said for 6 months and still have a ton of flies...........It doesn't WORK !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

    • See 1 previous
    • Doodle T and Me! Doodle T and Me! on Aug 03, 2021

      Gen, sorry the fly bags didn't work for you...my experience is that the water bags need to hang freely and be in full sunlight. This enhances the reflective nature of the water deterring the flies. Also there needs to be enough bags to encircle the area that you want to have fly-free. Jeanne - Doodle T and Me!

  • The flies laughed and laughed! This doesn’t work.