Pests We Treat - The Inspection: Finding Their Access Point

I started by inspection to determine where these drain flies were coming from. These flies don't venture far and they were breeding somewhere nearby in the home. I started with the most likely locations and inspected every interior drain in every room. I soon discovered that the problem area was the shower drain in the master bathroom. How did I know? As soon as I removed the drain cover, I was hit in the face by a swarm of drain flies that were none-too-pleased that I disturbed them!