Flies can enter your home through many different entry points, such as rotting vegetables and garbage cans, compost heaps, and walls. If you can identify these sources, you can remove the flies. However, you must also determine which type of flies are bothering you.
The first place you should look is outside your home. Make sure there is no garbage lying around, and that you are regularly emptying garbage cans. Another area where flies can be attracted is near a swimming pool. Keeping the pool chlorinated and keeping it clean can help reduce the number of flies.
The life cycle of flies depends on the temperature. They tend to reproduce faster during warmer days than they do in colder temperatures. Houseflies, for example, can complete their life cycle within seven to ten days, depending on their environment. During the warm summer months, they can lay as many as 500 eggs, which is why they are more prevalent in warmer regions.
The easiest way to kill flies is to ensure proper sanitation. Get rid of the food sources that attract them, such as meat, garbage, and rotting vegetables. Proper sanitation will help keep your home free of flies and help prevent them from breeding.