For some reason, we have had a sudden and major fly infestation today. I went into the kitchen around lunchtime and saw 8-10 flies hanging on the screen in the window or buzzing around. I went on the offensive, killing them with a combination of the electric fly swatter and a regular one.
Later, after my shower, I saw another big group of flies around the picture window in the living room and proceeded to go after those too.
There are still random flies around here, and I think they've wised up. They aren't landing anymore, so they're harder to kill.
