How to Deter Mice Without Poison
Block entry points, remove food sources, and use natural repellents to keep mice out of your home safely.
Quick answer
Seal gaps wider than 6 mm with steel wool and caulk. Store food in airtight containers. Place peppermint oil or humane traps along walls where you see droppings.
Mice enter homes through tiny gaps in search of food and warmth. Poison is risky if you have pets or children. A better approach is to make your home impossible to enter and unattractive to stay.
What you’ll need
- steel wool
- caulk or expanding foam
- peppermint essential oil or commercial mouse repellent
- airtight food containers
- snap traps or live-catch traps
- bin with a tight lid
Step by step
- 1
Find where they get in
Inspect the outside of your home and the areas behind kitchen units. Look for gaps around pipes, vents, under doors, and behind appliances. Mice can squeeze through a gap the width of a pencil.
- 2
Seal entry points
Stuff gaps with steel wool, which mice cannot chew through. Cover the wool with caulk or expanding foam for a neat finish. Fit a brush strip to the bottom of external doors. Check air bricks for damage.
- 3
Remove food sources
Transfer dry goods, pet food, and bird seed into glass or metal containers with tight lids. Wipe kitchen surfaces every evening. Empty kitchen bins daily and keep outdoor bins shut.
- 4
Lay traps along runs
Place snap traps or live-catch traps perpendicular to walls, with the trigger end against the skirting board. Mice run along edges, not across open floors. Use chocolate spread or peanut butter as bait.
- 5
Use natural repellents
Soak cotton wool balls in peppermint oil and place them in cupboards, lofts, and garages where droppings have been found. Refresh the oil every two weeks. Commercial mouse-repellent sprays can be used along known routes.
- 6
Clear clutter outside
Move compost bins, wood piles, and dense vegetation at least 30 cm away from walls. These give mice shelter and nesting material close to access points.
If you have pets, place traps where animals cannot reach them, such as inside locked cupboards or under raised units. Check live-catch traps daily. If you see chewed wiring, nesting in loft insulation, or large amounts of droppings, call a pest control professional. Do not handle live mice with bare hands.
Common mistakes
- Using expanding foam alone without steel wool, because mice can chew through foam
- Placing traps in the middle of a room instead of against walls where mice travel
- Leaving pet food out overnight or storing bird seed in cardboard boxes
- Relying on ultrasound devices as the only defence, which rarely work alone
Frequently asked
How do I know if mice are gone?
You should stop seeing fresh droppings and stop hearing scratching for at least two weeks. Check baited traps regularly. If they remain unsprung, the mice have likely left.
Are humane live traps better than snap traps?
Live traps avoid killing, but you must release the mouse at least 1.5 km away or it will return. Check them twice daily or the mouse may die from stress or dehydration.
Does peppermint oil really work?
It can deter mice temporarily, but it is not a permanent solution. It works best when combined with sealing entry points and removing food sources.
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