If you have cluster flies this is what we can do for you
First we identify that it is cluster flies. Cluster flies come in large numbers, congregating on lawns, sunny sides of exterior buildings, interior of windows, entering threw suffit, wall voids, and attics.
For the treatment we recommend doing a full exterior treatment with residual permetherin. We spray around suffit, fascia, doors, windows, and cracks and crevices where cluster flies congregate. We also suggest treating the interior around doors, windows and fogging the attic. This should take care of 90% of the population entering your home.