Ever since we moved to Maine we have had house flies. Every where you go there are flies. Even middle of winter there are flies in the house. My house is very clean too. I don't know if it is because we are in farm country or what but I can't stand it. There is a horse farm 4 houses up the road. Today the sun came out and it was warm, I got home from shopping and the front of my house was covered in flies. Inside my girls bedroom window( Between screen and glass, NOT in the house) were 30+ flies.Walking around outside there are flies on the ground that scatter as you walk. We kill the ones inside daily and next day they are back. HELP, there has to be something we can do?????