How to Get Rid of Mice in Your House (Walls, Apartments, and Without Poison)
Published: Aug 28, 2026 • Last updated: Sep 3, 2026To get rid of mice, seal every entry point larger than a quarter inch, then set traps every six to ten feet along the walls where mice already travel. Mice are curious rather than cautious, so unlike rats they do not need days of pre-baiting. A mouse trap set correctly tonight can produce results tonight.
Most rodent advice online treats mice and rats as the same problem with different sizing. They are not. Mice can squeeze through openings a rat could never use, they rarely travel more than about thirty feet from their nest, and they will investigate a new object instead of avoiding it. Every one of those differences changes how you should catch them, and getting it wrong is why people set six traps and catch nothing for a week.
Jim and Dave Schuelke have solved more than 3,000 rodent jobs across five states, with over 4,000 hours of camera footage from inside walls, attics, and crawl spaces. That footage is the basis for the rodent control tools they build and for the approach below.
How Mice Get In and Why They Are Harder to Seal Out Than Rats
A mouse gets through a gap around a quarter inch, roughly the size of a pencil, and a young mouse can squeeze through an opening as small as a dime. That is half of what a rat needs, and it puts a whole category of openings in play that most people never think to check:
• Gaps under garage doors and where the side seals have compressed
• Openings where pipes, wires, and cable lines enter exterior walls
• Dryer vents with damaged flaps
• Gaps at the base of exterior doors, especially where the threshold has worn
• Soffit and eave joints
• Utility penetrations in cabinets under sinks
• Gaps around window frames and where siding meets foundation
Mice can also climb well and nest in wall voids, insulation, and appliance cavities. Knowing how to get rid of mice starts with accepting that the openings letting them in are smaller than anything you would normally look for. The upshot is that a home can be perfectly sealed against rats and still be wide open to mice.
House mice are the species living in most homes. Deer mice are more common in rural properties and outbuildings, and matter more for health risks, since they are the primary carrier of hantavirus in North America. Both are small enough that the sealing standard is the same.
Because mice tend to stay close to their nest, mice activity tells you where to look. Mouse droppings concentrated under a kitchen sink usually mean mice live within thirty feet of that sink, not across the house. That is useful, because it narrows both your sealing inspection and your placement to a manageable area. Inspect your home along the walls on the inside first, checking behind appliances, inside lower cabinets, and along baseboards for droppings, gnaw marks, and nesting materials. If you are not certain where mice travel, UV tracking powder makes the runways visible under a blacklight.
How to Get Rid of Mice in Your House: The Basic Sequence
Seal first, within reason. With rats, sealing before trapping is absolute. With mice, seal what you can find, but do not let a hunt for every quarter-inch gap delay trapping, because mouse populations grow fast. A single pair breeds year round. Seal the obvious openings now, catch immediately, and keep working the exterior as you go.
Use materials mice cannot chew. Steel wool alone works loose and rusts. Expanding foam by itself gets chewed through. Stainless steel wire mesh cut to the opening and secured is what holds, finished over with caulk or foam for weatherproofing rather than as the barrier itself. A magnetic dryer vent cover closes one of the most common entries in a laundry room.
Then trap along the walls. Mice run with their bodies against a surface and avoid open floor. Set traps perpendicular to the wall with the trigger end touching it, so a mouse traveling in either direction meets the trigger. The New York State Department of Health recommends spacing traps six to ten feet apart along suspected mouse routes, which matches what the twins do on the job.
Use traps in numbers. This is the most common failure. Because mice stay near their nest and travel short distances, a trap fifteen feet off the runway may as well not exist. Coverage beats quality here. A dozen traps along the right wall will outperform three excellent traps in the wrong spot. Place setups in storage areas too, since boxes and clutter give mice protected cover.
Bait small and attach it. To lure mice reliably, peanut butter is the standard, and bacon works as well. Use a small amount worked into the trigger so the mouse has to pull rather than lick. A thick smear lets a mouse feed off the edge and walk away.
The Ultimate Rat & Mice Catch Traps handle mice as well as rats, with a baseplate that keeps the setup from being pushed around and a bait tugger that stops the clean-steal problem.
In an attic, use compact traps built for the space. See our best mouse traps for the attic.
How to Get Rid of Mice in Walls
Scratching inside a wall at night is how most people find out they have mice, and it is the situation where the wrong move costs the most. It is also where general advice on how to get rid of mice in house settings tends to fall down, because a wall cavity is not a place you can set a trap.
Do not use poison to kill mice in walls. A poisoned mouse retreats to its nest to die, which is inside the wall cavity you cannot open. The result is weeks of odor, flies, and sometimes a drywall repair to remove the carcass. Every professional source agrees on this point, and it is why the twins do not use poison on jobs.
Trap at the exits, not inside the wall. Mice leave the wall to feed. Find where they are coming out, usually gaps at the base of the wall, behind or under cabinets, near plumbing penetrations, or behind appliances, and set traps there. That is where the mouse has to be, and you can actually reach it.
If you cannot find the exit, the standard trick is to drill a small hole in the drywall a few inches above the floor near the activity, and place a baited trap directly against it. This gives the mice a route out that leads somewhere you control.
Seal the wall only after the scratching stops. Mice in the walls? Sealing an active wall cavity traps mice inside it, which produces exactly the dead-mouse-in-the-wall outcome you were trying to avoid. Catch first, confirm silence for several nights, then close it up.
Clean afterward properly. Mouse urine and droppings dry and become airborne when disturbed, which is a genuine health issue rather than just an odor one. The CDC\'s guidance on cleaning up after rodents is worth following. Do not sweep or vacuum dry. Wet the area first with an enzyme cleaner such as Twinzyme odor and urine removal, then remove.
How to Get Rid of Mice Naturally and Without Poison
Wanting to avoid poison is not a compromise position. It is what professionals do, for practical reasons rather than sentimental ones: poison kills slowly, kills in inaccessible places, endangers pets and children, moves up the food chain into owls and hawks, and does nothing at all about the gap the mouse walked through.
The non-toxic approach to deter mice is the same sequence above, plus attention to what is drawing mice in your home:
Cut the food supply. Mice need very little. Crumbs behind a toaster, an open bag of rice, pet food left out overnight, fallen fruit outside, and birdseed spillage are all enough to sustain a population. Move dry goods into food-safe airtight containers, glass or hard plastic rather than bags mice will chew straight through. Pick up pet bowls at night. Removing the food source and other things mice like does more to keep them away than any mouse repellent.
Cut the shelter. Cardboard boxes stored against walls, cluttered pantries, and are among the areas mice prefer most for nesting and travel. Mice build nests from shredded paper, insulation, and fabric, so storage areas full of soft material are prime real estate. Pulling storage away from walls alone removes a lot of usable habitat.
Understand what actually repels mice away from your home, and what does not. Mice do not like strong scents at close range, which is the basis for the peppermint oil and cotton balls approach that circulates constantly online. Cayenne pepper gets suggested for the same reason. Both have a mild, short-lived effect near the application point and neither will clear an established mouse infestation. A rodent repellent gel applied along entry approaches and travel routes is more durable than an essential oil, but the honest framing is the same: scent is support for sealing and trapping, not a substitute.
The same goes for the advice about getting a cat. Some cats hunt mice and some ignore them entirely, and a cat does nothing about the gap mice are entering through. If you were already considering a cat, fine. It is not a mouse control plan.
Choose your trap type deliberately. Snap traps kill instantly, which is more humane than a slow poison death. Electric traps do the same with easier disposal. Live traps are an option if you check traps multiple times daily, though a released mouse may return unless taken far from your home, and many areas have rules about relocating wildlife. Whatever you use, check traps daily and rebait as the food dries out.
How to Get Rid of Mice in Apartment Buildings
Working out how to get rid of a mouse or many mice in apartment settings means accepting a constraint houses do not have: you control very little of the building.
Report it in writing. In most jurisdictions, pest control in a rental is the landlord\'s responsibility, and a written record matters if it drags on. A professional pest control company hired by the building can treat shared spaces you cannot. This also gets shared walls addressed, which is important because mice moving between units mean your unit will keep being re-colonized no matter what you do inside it.
Seal what is inside your walls to reach. Gaps under the sink around plumbing, behind the stove and refrigerator, at baseboard joints, and around radiator penetrations are usually accessible and are usually the entry into your specific unit. Wire mesh packed into those openings is a fix a renter can make and reverse.
Trap inside your unit regardless. Even with building-wide treatment pending, traps along your kitchen and pantry walls reduce what is living with you now.
Control what you can control. In a building where neighbors leave food out, making your home the least appealing option matters more than it would in a house. Storing food in airtight containers and keeping a clean kitchen genuinely shift where mice concentrate, because what you remove no longer attracts mice into your unit specifically.
Skip poison entirely here. In an apartment, a poisoned mouse dying inside a shared wall is a problem you cannot fix and your neighbors will also live with.
Coverage Beats Cleverness
Mice are not difficult to catch. They are difficult to catch when traps are too few, too far from the nest, or set out in open floor where mice do not walk. Get the placement right, use more traps than feels necessary, seal the quarter-inch gaps, and the problem resolves faster than most people expect.
For sealing, stainless steel wire mesh is what holds up against chewing. For trapping, the Ultimate Rat & Mice Catch Traps are built around the failure modes the twins filmed. Both sit within the same range of rodent control tools Jim and Dave use on their own jobs, alongside the detection and cleanup products for the stages either side of trapping.