I am having to kill 10, 20 and sometimes 30 flies in my small home in
a day! I cannot figure out where they are comming in! I have set 10 fly
traps in my basement and caught ONE fly! They are always upstairs
with me! What do I do? I covered the outdoor dryer vent, when not in
use of course, and the outdoor exhaust pipes to the furnace, but I still
have them comming in by the dozen!! HELP!!
Do you by chance have livestock living nearby? I once lived on a farm with horses and the neighbours had cattle. The cluster flies were relentless. It was a well built solid home, but they managed to get in the attic and somehow they snuck through the frame of double hung windows. They mostly hung around the windows during the day, so I had to be sure to vacuum them up before dusk.
If this sounds like your problem,...good luck.. you can spray or you can have a pro do it, but I guarantee they will return. They lay their eggs in the ground close to the warmth of the house. Just keep your hoover handy!