Natural Mice Repellents Myths and Facts

Most mouse repellents don’t work for long. Plug-in ultrasonic repellers, peppermint sprays and natural scents like vinegar may keep mice away from one spot for a short time, but none of them will clear mice already living in your home. Blocking the gaps mice use to get in is the only thing that keeps them out for good.

Mouse repellent myths: what works and what doesn’t

Mice repellents most people try first when they find mice in the house:

Repellent	Works?	Why
Ultrasonic plug-in	No	Mice get used to it. One room only
Mothballs	No, banned	Naphthalene type is illegal to sell in the UK
Peppermint sprays	Short‑term	Smell fades. Mice ignore it near food
Vinegar	Short‑term	Only works while the smell lasts
A cat	Partly	Can’t reach nests in walls or lofts
Steel wool alone	If fixed	Set it in quick-setting cement
Sealing gaps	Yes	Mice squeeze through 5 mm. Block every gap

Do ultrasonic mouse repellers work?

No, not for long. Plug-in repellers give off a high-pitched sound that people can’t hear but mice can. Mice may avoid it at first, then they get used to it. Very loud ultrasound may stop mice entering a room for a while, but it won’t drive out mice raising young in a nest.

One room per device. Each plug-in covers a single room. Sofas, cupboards and boxes block the sound, so mice nesting in your walls, under the floor or in the loft won’t hear it.
Not near pet rodents. Hamsters, gerbils and guinea pigs can hear the sound, so don’t use a repeller in a room where you keep them.
No proof they work. Sellers aren’t allowed to claim a pest repeller works without UK trial evidence.

If you can hear scratching behind the plaster, see how to get rid of mice in the walls.

Do peppermint sprays and granules keep mice away?

Only for a short time. Shop-bought peppermint sprays, granules and herbal sachets work the same way as peppermint oil: mice avoid the smell while it’s strong. Once it fades they come back, and mice with food and shelter nearby soon put up with it.

They’re fine for keeping mice off a food cupboard while you seal the gaps, but they won’t clear an infestation. Many essential oils are toxic to cats, so check the label if you have one. To make your own, see our guide to smells mice hate.

Does vinegar get rid of mice?

Yes, vinegar is a natural mouse deterrent, but it won’t get rid of mice. The strong acetic acid smell interferes with a mouse’s scent receptors, and wiping surfaces with it removes the scent trails mice follow. It’s a short-term deterrent, not a long-term solution for a mouse infestation: the smell fades as it dries, and mice may get used to it. Vinegar works best combined with sealed gaps and traps.

Do mothballs keep mice away?

No. The old naphthalene mothballs are now illegal to sell in the UK. Naphthalene has been banned in pesticides since 2008 because its fumes are toxic to people, especially children, and it’s highly flammable. Moth repellents sold today use other ingredients and are made for clothes moths, not mice.

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Myth: a cat will get rid of mice

A cat may catch the odd mouse, but it won’t clear an infestation. Mice nest in walls, under floors and in lofts where a cat can’t reach, and they breed far faster than a cat can catch them: a female can have 5 to 10 litters a year. Cats that hunt also pick up worms, so they may need worming more often. More in our blog: do cats keep rats and mice away?

Does steel wool stop mice?

It can, but only when it’s fixed in place. Pack wire wool tightly into small gaps and set it in quick-setting cement or a sealant. Mice chew through caulk, rubber and plastic fillers, so don’t rely on those alone. For vents and air bricks, use mouse mesh instead. Our guide to finding mouse entry points shows where to look.

Myth: mice love cheese

Mice will eat almost anything, but cheese is a poor bait. Peanut butter or hazelnut spread works much better on a trap. See what mice eat to find out what draws them into your kitchen.

Myth: mice only get into dirty homes

Mice come in for warmth and shelter as much as food, which is why so many get in during autumn. A mouse needs only about 3 g of food a day and takes it from several places, so crumbs under the toaster or an open bag of pet food is plenty. Clean homes get mice too. If you’re not sure what you’re dealing with, check the signs of a mouse infestation.

What actually keeps mice away

Repellents buy you a little time at most. To deal with mice for good, block the gaps they use, keep food in sealed containers and set traps for the mice already inside. Our step-by-step plan to get rid of mice covers each step.

Still hearing mice after trying repellents? Our mouse exterminators find how they get in, treat your home and come back to check the mice have gone.

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FAQ

What sound do mice hate the most?

No single sound keeps mice away. They soon get used to any sound that repeats, including the high-pitched tone from a plug-in repeller, so noise only moves them on for a short time.

Do electromagnetic mouse repellers work?

There’s no reliable evidence that they do. Electromagnetic plug-ins claim to work through your home’s wiring, but like ultrasonic repellers they don’t remove the food and shelter that keep mice in your home.

Do mouse repellents work on rats?

No better than on mice. Smells fade, ultrasound is blocked by walls and furniture, and rats with food and shelter nearby soon ignore both. Sealing gaps and keeping food in sealed containers work for rats too.