Rodent Control
Updated November 6, 2026
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Safety
Avoid sweeping or vacuuming dry droppings, which can release harmful particles into the air. Wear gloves and a respirator or mask, ventilate the space, and dampen waste with a disinfectant or diluted bleach solution before wiping it up. Keep children and pets away from traps, bait stations, and contaminated areas, never handle dead rodents with bare hands, and wash thoroughly after any contact with affected surfaces.
Before the visit
Clear clutter along walls, in pantries, and under sinks so baseboards and suspected travel paths are accessible. Store food in sealed containers, pick up pet food overnight, and write down where droppings, gnaw marks, or noises have been noticed. Unlock attics, crawl spaces, garages, and utility rooms ahead of the appointment, and move items away from walls where traps or stations may be placed.
Repair vs replace
Exclusion repairs make sense once activity has been confirmed and reduced: sealing gaps larger than a quarter inch, installing door sweeps, patching chewed vents and screens, and closing openings around pipes, foundations, and rooflines. Gnawed structural wood, contaminated ductwork, or damaged wiring should be repaired promptly to prevent fire hazards and re-entry, and repairs are most effective when paired with an ongoing monitoring plan.
When to replace
Replacement is warranted when insulation is heavily soiled with droppings or urine and cannot be safely cleaned, when chewed electrical wiring is too compromised to repair, or when plastic and rubber components such as duct sections, gaskets, and weather stripping have been gnawed through. Stored food and porous items that rodents may have contacted should be discarded rather than kept, and saturated nesting material inside appliances or HVAC equipment typically requires component replacement.
Common issues
| Symptom | Likely causes | Safe check | Stop when |
|---|---|---|---|
| Droppings along walls, in cabinets, or near food storage | Active mouse or rat travel routes with feeding or nesting nearby | Wear gloves and a mask, spray droppings with disinfectant before wiping, and note the size and location to share with a technician | Droppings appear in food preparation areas, near HVAC intakes, or in large quantities suggesting a heavy infestation |
| Scratching or scurrying noises inside walls or ceilings at night | Rodents moving between nests and food sources or nesting in insulation and wall voids | Listen and record the times and rooms where sounds occur without opening wall cavities | Noises come from electrical panels, near wiring, or are accompanied by a burning smell |
| Gnaw marks on wood, plastic, wires, or stored items | Rodents chew constantly to wear down their teeth, targeting materials along travel paths | Photograph the damage without touching it and check whether any electrical cords are affected | Chewed wiring, gas lines, or appliance connections are found; shut off power to affected circuits and arrange professional help |
| Greasy rub marks along baseboards, beams, or entry points | Oils from rodent fur transfer onto surfaces along repeated travel routes | Look low along walls, behind appliances, and near gaps, then mark the locations with tape | Rub marks lead into wall voids near electrical equipment or appear across multiple rooms |
| Shredded paper, fabric, or insulation gathered in hidden spots | Mice and rats collect soft materials to build nests in wall voids, appliances, or attics | Observe from a distance without disturbing the nest and note its exact location | A nest is found inside an appliance, HVAC system, or near electrical components |
| Pets staring at walls, pawing under appliances, or acting alert at night | Animals detect rodent movement and scent that people often miss | Once the pet is moved away, inspect the area for droppings, gaps, or rub marks | A pet catches or mouths a rodent or shows signs of illness after possible contact |
| Musky, ammonia-like odor in enclosed rooms or cabinets | Accumulated urine and droppings, or a dead rodent inside a wall or crawl space | Ventilate the room, avoid breathing deeply near the source, and track where the smell is strongest | The odor is strong and persistent, suggesting a decaying animal inside a wall or duct that needs professional removal |
| Small chewed holes or gaps in walls, floors, or around pipes | Entry points created or widened by rodents moving between outdoors and living spaces | Measure the gaps and check nearby for droppings or rub marks, but leave them open until activity is assessed | Gaps sit near wiring, plumbing, or gas lines and should not be sealed until a technician evaluates the area |