How to Completely Get Rid of Mice in Your House | Seal, Trap, Then Confirm

Clearing house mice takes six moves: find the activity, cut off food and water, seal every gap wider than a pencil, trap indoors, and keep checking until the signs stop.

That is why the EPA’s guidance puts the emphasis on exclusion and sanitation rather than on poison — removing food, water, and shelter is what actually ends an infestation.

Here is the order that works, the baits worth knowing if you go that route, and the mistakes that let mice come straight back.

Start by Confirming Where the Mice Are

Inspect before you buy anything, because the evidence tells you where traps and sealing work belong. Look for droppings, gnaw marks, shredded paper or fabric, greasy rub marks along walls, and torn food packaging.

Concentrate on kitchens, utility rooms, attics, basements, garages, and anywhere plumbing, wiring, vents, or the foundation passes through a wall. Mice follow edges, so droppings along a baseboard usually mean a run, not a random wanderer.

Take Away Food, Water, and Shelter

Mice stay where the basics are easy, and cutting those off makes every trap work better. Store human food and pet food in sealed containers, wipe up crumbs and spills, and secure garbage in lidded bins.

• Fix dripping pipes and standing water outdoors.
• Clear clutter — stacked cardboard, old bedding, and piles near walls are nesting sites.
• Keep pet food bowls emptied overnight rather than left full.

Do this step before setting traps. Traps catch what is already exploring; removing attractants stops the next wave from arriving. If you want tested hardware rather than trial and error, this roundup of the best products to get rid of mice covers traps and bait stations that hold up in practice.

Seal Every Gap Wider Than a Pencil

Exclusion is the step most people skip, and it is the one that makes the difference permanent. Mice can compress through openings far smaller than their body, so check along pipe and cable entries, door and window frames, foundation and roofline seams, and vents.

Fill openings with a durable material suited to the gap — steel wool packed into a hole before sealing is the classic approach, because mice gnaw through foam and plastic easily. Protect ventilation openings with a sturdy cover that still allows required airflow. The EPA’s guidance on dealing with rodent infestations treats sealing as the core step, and it explains why: mice released outside can simply walk back in until the entry points are closed.

Traps, Baits, and What the Labels Actually Require

Trapping indoors is the safest control method in a home with children or pets, as long as the traps are mouse-sized — the EPA warns that rat-sized traps are wrong for mice. Set snap traps where you found activity, tight against walls, and keep them out of reach of kids and pets.

Live traps only relocate the problem. Released mice walk back in if the structure is still open, which is why trapping follows sealing rather than replacing it.

Rodenticide is optional and last. The EPA’s advice on using rodent bait safely is blunt: misuse can harm people, pets, and wildlife, so bait belongs inside tamper-resistant stations and nowhere else. The registered label controls every detail.

Clean Up Safely, Then Keep Watching

Never dry-sweep or vacuum mouse droppings — that throws contaminated dust into the air. Wear gloves, dampen the debris with disinfectant before wiping it up, and bag everything for the trash.

Remove carcasses promptly with gloves, following the product label and local disposal rules, and wash up afterward. Prompt removal matters most after any bait use, since a poisoned mouse can harm a pet or hawk that finds it.

Keep checking after activity stops. New droppings, gnawing, or nesting material means survivors or a gap you missed, so reseal and reset the traps. Go back over the entry points, run the trap line again, and only call it done after two or three quiet inspections.