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What is the Best Mouse Repellent?

Updated on July 11, 2013

Peppermint Oil, Ultrasound and Other Mouse Repellents

There are many, many mouse repellents out there, ranging from a cayenne pepper on a string to ultrasonic devices. This can make it very difficult to choose which to use. One thing most mouse repellents have in common is that they get mixed reviews. Some people find that they work, while others find that the same repellent has no effect, or that it works only for a short time.

One problem with many mouse repellents is that they only work for a short time. Many repellents work by smell, and smelly substances have a tendency to become less intense with time. Like most animals, mice also have a tendency to become used to something that is present for a long time. This is called habituation, and is similar to a human learning to tune out the sound of next door's dog barking or the TV going constantly.

So how useful are mouse repellents? They can be useful, if they are used correctly, but they usually aren't a complete solution to a mouse problem.

Image: Ultrasonic Pestrepeller on Amazon

Ultrasound Repellents

Ultrasound has been used for decades to repel mice and rats. Unfortunately, ultrasound appears to be more effective in the laboratory than in real life. Laboratory rats and mice appear to be more sensitive to ultrasound than wild rats and mice. Ultrasound is also directional, and the repelling power decreases rapidly as the distance from the ultrasound source increases. You need to put the emitter close to the things you most want protected.

Like many things, ultrasound is something mice and rats can become habituated to, so you will probably find that it works better at first than it does later. If it stops working, try turning it off for a couple of weeks and using a different type of repellent. Then turn on the ultrasound again.

If you have pets, you should avoid using ultrasound because pet dogs and cats can hear higher frequencies than humans can, and ultrasound may bother them. If you have pet rodents, they should not be anywhere near an ultrasound emitter.

Victor M754 Mini PestChaser Ultrasonic Rodent Repellent, 4-Pack  (not available in HI or NM)
Victor M754 Mini PestChaser Ultrasonic Rodent Repellent, 4-Pack (not available in HI or NM)

I've used these and they work to start with, but you need to take a break from them or the rodents will get used to them and ignore them.


Peppermint Oil, Spearmint Oil and Other Plant Materials

Repellents in this category tend to be quite safe, although they also tend to lose their effectiveness with time. Plant-based repellents are also the easiest homemade mouse repellents. You might even have some of the original plants, such as cayenne pepper or spearmint, growing in your garden.

If you want to keep things really simple, you could try placing mint sprigs or a cayenne pepper on a string around food and food preparation areas.

Spearmint or peppermint oil is sometimes used in commercial mouse repellents, as is balsam fir oil. Clove oil, Tabasco Sauce, Cinnamon, Citronella and Eucalyptus may also work. Try a few and see if they work on your mice.

Unfortunately, most mouse repellents do not work indefinitely due to habituation and/or losing their potency. Rotation of different repellents is likely to increase the effectiveness of your repellent program.

Which Mouse Repellents Have You Used?

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More Mouse Repellent Tactics

Mouse predators

Mice may also be repelled by the presence of cats even if the cat is a poor hunter. On the other hand, rodents have also been known to steal food out of the cat's dish when it isn't around, so cats are clearly not very effective as a repellent. Rats will kill mice, and mice are afraid of them, but rats are even worse to have loose in the house than mice. There are some commercial repellents based on the urine of mouse predators that may be partly effective.

Keeping Rodents Out

As well as attempting to repel mice, you should also investigate to find out how they are getting into your house. A mouse can enter through a dime-sized hole so it may be hard to find the entry points. Sometimes homeowners have to teat off siding in order to find the holes! Once you find them, block them with something solid, stuff them with steel wool, or place metal sheeting over them. Both rats and mice will chew on the edges of a small hole to make it bigger, and will chew away the insulation on electrical wiring where it passes through a wall.

Reducing Attractants

In addition to repelling mice, it is important to reduce mouse attractants. Spilled food, leftovers and food that isn't in mouse-proof containers will attract mice. Close cupboards, put a lid on your garbage and compost bins, and clean up spilled food. This way the mice will have less reason to chew their way in, or to put up with the repellents and you are more likely to become mouse-free.

Have you ever had mice in your house?

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    • mojoCNYartist profile image


      4 years ago from CNY

      I've tried a number of these, and still have mice. The sound things did nothing, and the mint I sprayed so much that it burned my eyes and nose....mice still came out later that night. Only thing that has worked were glue traps, but adults cannot be caught with them.

    • profile image


      4 years ago

      Yes after a severe tornado hit our home on April 28,2014 we have had them getting in the house in every hole in the roof the walls the floor every day we have at least one usually two we lost every single tree in our yard some had been there almost 100 years I have been told (by professionals) that they probably lived under the giant roots I hate them I can deal with a RATSNAKE get a few of them loose I am frustrated freaked out by them I am 45 and am not scared of much but mice and these rats yt?

      Gross the snake would probably bite my kids or eat my 5lb Chihuahua

    • profile image


      5 years ago

      I live in the countrry and come fall, the mice start trying to get in. I have plugged all the holes I could find and they still got in. I find DECON and mouse traps to be the most effective. Going to try Peppermint oil next and probably plant mint around the house and get plants that rodnts don't like to plant around the flower and vegetable gardens. Good luck.


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