has anyone else been over run with large flies lately,last 3 days weve counted 25???all gone now but the minute someone opens a door or window they come in.anyone got any ideas why they would just appear and whats the best way to get rid and keep them away,i do have a dog and 4 children(1 bad asthmatic)so i dont want to spray or leave things around the house,im wondering if this new recycling household rubbish has anything to do with it??