Everything under the hood gets wet whenever you drive around in the rain, cars are not built with waterproof engine bays. Spraying peppermint oil shouldn't cause any issues, aside from maybe making things sticky when it dries.
Mice have a very strong sense of smell and are often repelled by very strong odors like cinnamon, vinegar, dryer sheets, clove oil, peppermint, tea bags, and cayenne pepper.
Mouse nest:
The first place you should look is inside your car's airbox (that's where the engine air filter is located). Mice love this location because it's warm and protected from the elements. Open the box and look for signs of rodent freeloaders.
The strong scent of peppermint is overwhelming to mice. Similarly, essential oils such as eucalyptus oil, bergamot oil, clove oil, and cinnamon oil are potent in keeping mice at bay. One study noted that eucalyptus oil applied once a day was more effective as a rat repellant than once a week.
Zinc phosphide is an acute toxicant that causes the death of a house mouse within several hours after a lethal dose is ingested. It appears to be the fastest way of getting rid of mice by reducing their population.
Their strong fragrance can be unpleasant to rodents and discourage them from entering. Place a few dryer sheets in various areas, such as the trunk and under the seats. While dryer sheets can help deter mice, they're not a guaranteed solution.
Peppermint oil and cayenne pepper are reported to deter rodents. Note that spray products will need to be reapplied routinely, because they can wear away and rinse off. Honda rodent-deterrent tape. There are ultrasonic devices that emit sounds to deter rodents, but at a frequency that humans can't hear.
Liberally spray peppermint oil or Pine-Sol on your engine block -- the rodents don't like the smell or taste of those chemicals.
Mice can enter through extremely small spaces, so even the smallest crack or hole should get a dose of peppermint oil. The scent of peppermint oil needs to stay strong in order to keep mice away. So make sure you're reapplying a few times a week to keep mice away.
Do Dryer Sheets Keep Mice Out? While some people believe the strong scent may deter mice, dryer sheets are not considered a reliable or long-term solution. Other proven methods like sealing entry points and professional rodent control services are recommended for better results.
Irish Spring soap is not likely to keep mice away from your house– and the strong fragrances could even be attractive to them. Rats & mice might initially be deterred by the overwhelming odor, but after a while they'll get used to it, and may even take a nibble to test it as food.
Dryer sheets can do more than freshen your clothes! You can use their odor-eliminating power to your advantage when cleaning your car. From freshening the scent of your car's interior to removing dead bugs from the exterior to reducing pet hair, dryer sheets are all-around good news for your used car.
Signs of an Infestation
A much more likely scenario is that you're already too late. Spotting one elusive mouse typically means there are at least five or six hiding out in your walls, basement, or attic. This is particularly true if you see a mouse at night or in a low-traffic area of your home.
Plus, vinegar isn't always effective at keeping rodents away. While the smell may irritate some, others bypass it completely to reach food. To combat the mice problem in your home, you'll need to rely on proven pest control methods to eliminate pesky pests.
But Epsom salt isn't just good for humans! It can also be used to repel rodents due to its acrid smell. Sprinkling Epsom salt onto your trash can lid or around areas where rodents are known to burrow creates a protective boundary that can keep them away.
It may seem like a folk remedy, but aluminum foil is actually an effective natural mouse repellent. Mice dislike the sound and smell of aluminum foil. And even though they are good climbers, they just can't cling to it. To use aluminum foil to repel mice, wrap it around the objects you want to protect.