we are in a log home on the western slope of Colorado, flies are the issue. we still have snow, but as temps are getting up to 50’s the flies are showing up already. they are always all over the windows, live about 10-15 minutes and die. there will be dozens and dozens, and vacuuming on floors around all windows 3 times a day or more. we’ve used 4 bug bombs at a time, and they still return.. any suggestions that will last awhile?