Ceiling Secrets: Solving Mice and Hidden Pests in Drop Ceilings & Plenums

We respond to a commercial call where tenants hear scratching above the tiles and find insulation disturbed — a classic drop-ceiling mystery. This episode walks listeners through what technicians look for during an inspection, how to distinguish mouse activity from harmless noises, and which clues (droppings, gnaw marks, heat-loss gaps, and insulation nests) point to a pest problem versus a building issue. Dana breaks down behavior and access routes through ducts, light fixtures, and cable penetrations, while Mikey focuses on practical exclusion, sanitation, and monitoring steps that fit real maintenance schedules. The XTERMIGATOR DIY Report gives 3–5 safe, non-chemical moves—seal, proof, monitor, clean, and coordinate with building maintenance—so listeners can reduce activity tonight. Red flags and when to call a pro are emphasized, plus a quick myth-buster on “ultrasonic fix” claims. Warm, practical, and geared to both homeowners and facility managers.