Try this to keep out mice.

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Large structural openings may require proper building repair.

The goal is simple:

Don’t merely make the house smell unpleasant to mice. Make it physically difficult for them to enter.

Then Remove the Food Reward

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A mouse doesn’t need an open bag of bread sitting on the counter.

Small amounts of accessible food can be enough.

Store grains, cereal and similar foods in sturdy containers.

Clean crumbs from beneath appliances.

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Don’t leave dirty dishes overnight when possible.

Keep garbage covered.

Clean spilled birdseed.

And if mice are active, avoid leaving pet food sitting out all night.

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Water matters too.

A dripping pipe or persistent condensation can provide a convenient source of moisture.

What About Peppermint Oil?

This is probably the most famous internet mouse remedy.

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People soak cotton balls in peppermint oil and place them around cabinets because mice are said to hate the smell.

The problem is reliability.

A strong odor may influence where a mouse travels temporarily, but a hungry mouse with access to food and shelter isn’t necessarily going to abandon a building because one corner smells minty.

The odor also fades.

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So peppermint may make your kitchen smell fresh, but don’t depend on it as your primary mouse-control strategy.

Essential oils can also pose risks around pets depending on the oil, concentration and exposure, so “natural” doesn’t automatically mean harmless.

And Dryer Sheets?

Another popular claim says placing dryer sheets behind appliances keeps mice away permanently.

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Again, there isn’t good reason to treat this as a dependable solution.

Even if a new smell initially bothers a mouse, odors dissipate and animals can become accustomed to environmental changes.

Meanwhile, the entry hole remains open.

That’s the fundamental weakness shared by most viral repellent tricks.

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They focus on making mice uncomfortable rather than removing what brought them inside.

Don’t Use Mothballs as a Casual Mouse Repellent