Cockroaches need three things to establish a colony: food, water, and warmth. Danvers's housing stock gives them exactly that. A blend of dense urban multi-family buildings and single-family suburban homes, nearly all with basements given the cold winters. Combined with Danvers's climate — a humid continental climate moderated somewhat by the coast, with cold, snowy winters and warm, humid summers — indoor cockroach pressure rarely lets up on its own.
Treatment starts with locating the harborage points — the tight, warm, food-adjacent spaces roaches actually live in — and applying gel bait directly there rather than spraying open floor space. This targets the colony at its source and avoids the resistance issues that plague over-the-counter sprays. We follow up to verify the population has collapsed, not just scattered.