Amw PestControl on Instagram: "cluster flies don’t just sit on windows. they hide deep inside window frames, wall voids, and structural gaps. after a professional cluster fly treatment, you’re watching them get flushed out of their hiding spots in real time. this is why surface sprays don’t work and why proper interior and exterior treatment is critical to fully eliminate cluster fly infestations. if you’re dealing with flies coming back year after year, it’s usually because the source was never