Window Fly Traps
There are some locations on Earth where flies can be an issue, regardless of how clean the area is. Having a method to capture them and eliminate them is a useful device to have. These window fly traps will undoubtedly catch the attention of people who suffer from this condition.
Although this remedy appears to be effective, it does result in a somewhat unsanitary condition. Furthermore, you must touch it to remove it. Eek!