During summer and in humid climates, flies can be obnoxious and make it almost impossible to have family gatherings outside. They can also get inside and contaminate food as well as make your house feel like you are outside rather than inside. Luckily, there is a great fly-killing trap you can make at home to get rid of those pesky intruders.
Cut your plastic bottle into three parts. Using your scissors, carefully cut the bottle in two about two-thirds of the way up. Make your next cut right below the neck. Keep the large piece that is two-thirds of the bottle and the part that includes the neck; throw the middle piece away.
Place water in the large section of your fly killer. You want to fill the bottle about halfway so there is enough room for the neck part. If you like honeybees and would like them to avoid your trap, mix ¼-cup of vinegar. The foul smell will keep honeybees out of your trap but won't keep the flies from falling into your trap.
Apply jam or honey on the inside of the neck's nozzle to attract the flies to your trap.
Take the neck part and place it upside down inside the larger section. Make sure the neck's nozzle is not touching the water, but rather hanging inside the large section about two inches above the water. Use tape or staples to help secure the neck to the larger part of the bottle fly killer.
Make two holes opposite of each other on the top of your trap if you would like to hang the trap, such as from a tree. Then, simply thread wire through both holes for a strong hanging support.
Place your trap where you need it most. You might decide to make multiple ones at first to help control the fly population if you think your property has an overpopulation of flies. If you have flies inside your house, make one to sit or hang in your kitchen. If you put your trap outside, aim for a shaded area to help keep the honey or jam from melting.