Scrub the dust off your window screens
The best way to keep flies, mosquitos, and other little bugs out of the house in the summer is to install some good screens on your doors and windows. Yet, even if they are perfect for that purpose, they come with their own problems. For example, they are prone to end up dirty with dust, and they are impossible to clean.
Of course, a good old toothbrush is our recommended solution to this issue. They might seem too small to cover the whole surface of your screen, but they are worth the try. If you take the time to scrub all the dust and fluff off them you will definitely see the difference. It is a tough job but it pays off.