Myth Busting Natural Mice Repellents

For centuries, people have played ‘hunt the mouse in my house' and, over time, have shared tricks, tips, and 'old wives’ tales on how to get rid of mice naturally. But how many of these are simply myths, and which DIY mouse control solutions might actually help deter these rodents?

While DIY mouse remedies are accessible and low toxicity, their effectiveness against established infestations is often exaggerated. Understanding the limits of natural solutions is key to knowing when to switch to professional pest control for reliable, long-term protection.

Not really - most natural mouse repellents that you’d usually think of such as peppermint oil, moth balls, garlic, vinegar and ultrasonic sound waves generally do not work as long-term solutions for infestations and only provide temporary, localised deterrence. While strong scents can annoy mice, they quickly adapt to them.

It’s possible you might notice a short term, temporary effect - seeing less rodents around, but these methods will not permanently eliminate mice from your home or business premises.
Mice need only a little food (about 3g a day) and nesting material to make themselves at home. Once they’ve found a safe, warm place away from predators, they will not move out, putting up with ultrasonic sound waves, mothballs or strong scents rather than risk leaving.

No, mothballs are for moths.

• Myth - There is an 'old wives' tale' that placing mothballs near a mouse nest will deter them because the Naphthalene (a strong-smelling, white substance) in the mothballs reduces the ability of blood cells to carry oxygen and will affect the mice.
   
  
• Truth - the amount of Naphthalene in mothballs is far too small. It’s enough to deter moths and other insects but has no visible impact on rodents. Even if mice were irritated by the smell of mothballs near their nest, they would simply gnaw another entrance to avoid them. Relying on mothballs for effective mouse control is not recommended. Also, mothballs do not address the causes of an infestation or remove the mice already inside, they should not be considered a solution for keeping mice away from your home.

No, peppermint oil will not permanently get rid of mice.

• Myth: Another folklore assumes that because mice are sensitive to scents, high concentrations of intense peppermint oil will upset their sense of smell and deter them from your home.
• Truth: Peppermint oil's strong scent can temporarily mask the smell of your rodent problem and mildly irritate mice, but it is not an effective long-term deterrent. The scent dissipates quickly, losing its effect on  the ground areas inhabited by mice. Despite its anecdotal popularity as a "safe" natural remedy, scientific evidence does not support its effectiveness as a standalone repellent because it has minimal impact on rodent behaviour. Peppermint fails to address the actual drivers of an infestation, such as available food sources and accessible entry points.

No, they are inconsistent and mice will tolerate them if food and shelter are available.

• Myth: Ultrasonic rodent repellent devices are designed to emit high-frequency sound waves that supposedly disturb and drive away rodents. In theory, these sound waves are irritating to mice but are inaudible to humans and most household pets.
• Truth: Scientific studies and field tests have shown that the effectiveness of these devices is inconsistent. Mice may avoid them at first but quickly become used to the noise if food and shelter remain attractive. Also, ultrasonic sound waves do not travel well through walls or furniture, creating quiet “dead zones” where mice can hide without being affected. While ultrasonic repellent devices might seem like a low-maintenance solution, they are unlikely to provide reliable or long-term mouse control.

When repelling rodents like mice, prevention is key. Mice are skilled at finding their way indoors through even the tiniest cracks, so it’s essential to make your property less inviting to them. Here are 3 steps you can take yourself to naturally discourage mice and secure your premises against unwanted furry visitors.

Regularly inspecting your property for holes, cracks, and gaps is essential to keeping mice out. Focus on both the exterior and interior walls, as well as around doors, windows, pipes, and cables, since mice can squeeze through very small openings. Mice are great climbers; They scale rough, vertical surfaces and scurry along thin cables and wires. Remember to check for gaps higher up, on your rooftop and in the attic not just near the ground. For more top tips on how to deter mice check our mouse deterrents page.

Sealing small holes in your property to prevent easy access to mice is advisable, but is adding steel wool as part of the repairs more beneficial than just sealing the gap?

Mice are unlikely to chew through steel wool. However, if the steel wool isn't packed tightly enough, determined mice may pull it out and continue trying to gain entry. Therefore, combining steel wool with caulk—or another flexible sealant—creates a much more effective barrier because the mixture holds the wool in place and blocks entry routes. For air bricks or vents, especially if they are damaged, use fine galvanised wire mesh to allow airflow while keeping mice from squeezing in. Taking these extra precautions not only improves the strength of your mouse deterrent efforts but also helps protect your home from future infestations.

Mice feed little and often, only needing about 3 grams of food a day to survive. Even tiny food scraps, like a few crumbs under the fridge or a forgotten biscuit behind the sofa, are enough to keep mice coming back. Keeping your property clean and tidy is one of the simplest and most effective ways to deter rodents. Regularly sweep and vacuum kitchen and dining areas, making sure to clean underneath appliances, along baseboards, and in corners where crumbs tend to gather. Store foods such as grains, pasta, and snacks in sturdy, airtight containers made of glass, metal, or heavy-duty plastic, since mice can easily chew through thin plastic or cardboard packaging. Moreover, take out the rubbish promptly and avoid leaving pet food or dirty dishes out overnight, as these can also attract hungry mice. Maintaining a clean environment not only denies mice a food source but also makes your living space less inviting and reduces the chance of an infestation taking hold.

Eliminating a mouse infestation can be a challenging task, especially when natural repellents or DIY deterrents fail to deliver lasting results. Professional mouse control services offer a decisive solution, combining expert knowledge with specialised tools to address even the most stubborn rodent problems.

If you’re concerned you may have a mouse infestation, contact Rentokil today. Our technicians are highly trained and professionally qualified, with credentials recognised by the pest control industry, BPCA and NPTA. Frontline staff maintain expertise through the CRRU-recognised Basis PROMPT CPD scheme. We understand that every property and situation is unique, so we tailor our approach to address your specific needs while ensuring the safety of your family and pets. By combining proven exclusion techniques and professional-grade deterrents, we can help you achieve long-lasting protection against mice.