The best thing for getting rid of mice is a combination approach: seal every entry point you can find, set snap traps with high-value bait, and keep at it until activity stops. No single product solves a mouse problem on its own. Traps kill the mice already inside, but if you skip exclusion work, new mice walk right in through the same gaps.
Seal Entry Points First
Mice can squeeze through any opening a quarter inch or larger, roughly the width of a pencil. Before you set a single trap, walk the perimeter of your home and look for gaps around pipes, utility lines, dryer vents, foundation cracks, and where siding meets the foundation. Check interior spaces too: behind the stove, under the sink where plumbing enters the wall, and around basement windows.
The most durable seal combines steel wool with expanding foam. Stuff steel wool tightly into the gap, then cover it with spray foam. Mice can chew through foam alone, but they won’t chew through steel wool. For larger openings, quarter-inch galvanized hardware cloth (a type of wire mesh) is more permanent and can be screwed or stapled into place. Metal flashing works well for bigger gaps along the foundation or roofline. Some manufacturers sell spray foam specifically designed for rodent exclusion, which has a harder cure than standard foam. Copper mesh is another option that won’t rust like steel wool can over time.
This step matters more than any trap or poison. A house with open entry points will attract new mice indefinitely, turning a one-time problem into a seasonal battle.
Snap Traps Are the Most Reliable Option
Classic snap traps remain the go-to for most pest situations. They kill quickly, they’re cheap enough to deploy in large numbers, and you can see exactly what you’ve caught. Set more than you think you need. For an active infestation, 10 to 12 traps in a single room is not overkill. Place them perpendicular to walls with the trigger end facing the baseboard, since mice travel along edges rather than across open floor.
Electronic traps deliver a lethal shock and work well for people who don’t want to see or handle the kill mechanism. They’re more expensive per unit but reusable and easy to empty. Live-catch traps are an option if you want to release mice outdoors, though you’ll need to release them at least a mile from your home or they’ll find their way back. Glue traps are widely considered the least humane option and often fail to kill, leaving a live mouse stuck to a board.
What Bait Actually Works
Peanut butter is the classic recommendation, and it works well because mice have to lick and tug at it rather than snatching a piece and running. But if peanut butter isn’t producing results after several days, mice in your area may be avoiding it. People dealing with stubborn infestations have had success rotating through different baits: bacon fat tied in a knot on the trigger (the toughness makes it hard to nibble off without tripping the trap), sunflower seeds pressed into peanut butter, chocolate, cashews, and even sesame oil dabbed on a small piece of cloth.
One effective strategy is changing your bait every week or so. Mice are neophobic at first but also become cautious around familiar smells they associate with danger. Rotating between bacon grease, chocolate, and peanut butter keeps the traps novel. For bucket-style traps, dry dog food and black oil sunflower seeds scattered at the bottom work as effective lures. If you’re using a bait that mice can steal without triggering the trap, try super-gluing a small nut directly to the trigger plate so they have to work at it.
Rodenticide Bait Stations
Poison bait stations are an option, but they come with real tradeoffs. The mouse dies somewhere you can’t control, often inside a wall, which can mean a smell that lasts days or weeks. There’s also the risk to pets, children, and wildlife that might encounter a poisoned mouse.
The EPA classifies ready-to-use bait stations into four tiers based on safety. Tier 1 stations are tamper-resistant to both children and dogs and can be used indoors or outdoors within 50 feet of a building. Tier 2 stations offer the same child and pet resistance but aren’t weatherproof, so they’re indoor-only. Tier 3 stations resist tampering by children but not pets, meaning they should only go in areas pets can’t reach. Tier 4 stations have no verified tamper resistance and should only be placed where neither children nor pets can access them.
The most effective rodenticides are restricted to licensed professionals. Consumer-grade poisons use less potent active ingredients, and some homeowners find them ineffective against established populations. If you go the poison route, read the label carefully and choose the highest tier station you can find for your situation.
Signs You Need a Professional
DIY methods handle most minor mouse problems. But some situations call for professional help. If you’re finding droppings on multiple floors of your home, hearing scratching in walls in several rooms, or still catching mice after weeks of consistent trapping and exclusion work, the infestation is likely larger or more entrenched than surface-level efforts can reach.
Older homes are particularly challenging because they have decades’ worth of settling cracks, gaps around original plumbing, and hidden entry points in places you can’t easily inspect. A professional exclusion service will systematically identify and seal every gap, which is often the piece homeowners miss. Pest control companies also have access to commercial-grade rodenticides that aren’t sold to consumers, which can make a significant difference for heavy infestations. The typical approach is a two-phase process: an exterminator eliminates the active population, then an exclusion specialist seals the structure to prevent re-entry.
Cleaning Up Safely
Mouse droppings and urine can carry diseases, including hantavirus, so cleanup requires some care. The most important rule: never sweep or vacuum droppings. Sweeping launches tiny particles into the air where you can breathe them in. Instead, the CDC recommends opening doors and windows for 30 minutes to ventilate the space before you start. Leave the area during that time.
Put on rubber or plastic gloves, then spray the droppings and surrounding area with a disinfectant or a bleach solution (1.5 cups of household bleach per gallon of water, or roughly 1 part bleach to 9 parts water). Let it soak for at least five minutes. Then wipe everything up with paper towels and dispose of them in a sealed plastic bag. Make the bleach solution fresh each time you clean, since it loses potency after mixing.
For heavy infestations with large amounts of droppings or nesting material, you’ll want more protection: disposable coveralls, goggles, rubber boots or shoe covers, and a respirator with a HEPA filter. Fleas are common on mice, so applying DEET-based insect repellent to your clothing and hands before handling dead mice or nesting material reduces the chance of flea bites.
Preventing Mice From Coming Back
Once you’ve cleared an infestation, keeping mice out is about removing what attracted them. Store all dry goods, pet food, and birdseed in hard plastic or glass containers. Take garbage out regularly and use bins with tight-fitting lids. Keep your kitchen clean of crumbs and grease, especially behind the stove and refrigerator where spills accumulate unnoticed.
Outside, move woodpiles and dense vegetation at least 20 feet from your foundation. Trim tree branches that overhang your roofline, since mice are good climbers and will use branches as a bridge. Recheck your exclusion work every fall, when dropping temperatures drive mice to seek warmth. Gaps that were sealed with foam alone may need reinforcement after a season of weather exposure. A quick walk around the foundation in September or October, patching anything that’s deteriorated, is the simplest thing you can do to avoid another winter infestation.