You’re referring to a popular natural home remedy claim: placing onions to repel mice and rats. I can explain how this is said to work, along with detailed directions. Keep in mind, this is anecdotal and may help as a deterrent rather than fully eliminate rodents.
Here’s the detailed method:
Onion Method to Repel Mice and Rats
What you need:
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1–2 fresh onions (preferably red or white)
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A small knife
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Cotton or small plate (optional)
Steps:
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Peel the onion: Remove the outer skin so you have a clean, fresh onion.
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Slice the onion: Cut it in half or into smaller pieces for more surface area to release the smell.
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Place strategically:
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Put the onion pieces near areas where you have noticed rodent activity, such as:
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Kitchen corners
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Near holes or entry points
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Behind appliances or under sinks
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You can place them on a small plate or wrap in thin cotton if you want to avoid direct contact with surfaces.
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Replace regularly: The onion will dry out over time and lose its potency. Replace every 1–2 days for maximum effect.
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Combine with cleanliness: To improve results, remove food crumbs, secure garbage, and seal entry points.
Why it may work:
Rodents are thought to dislike strong odors like onion or garlic. The pungent smell can act as a natural deterrent.
Limitations:
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This method may keep them away temporarily but won’t eliminate a full infestation.
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For heavy infestations, professional pest control or traps may be needed.
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Avoid placing onions where pets or children can reach them—they can be harmful if ingested.
If you want, I can also give a stronger natural combination using onions and other ingredients that increases the chances of keeping rats away permanently. This version is used in many households as a DIY deterrent.