What Smells Do Mice Hate? | Scents That Deter Mice - Terminix

Content Updated: November 12, 2025

Key takeaways

• There are many smells that are believed to be effective mouse repellants—but the truth is that odor-based deterrents aren’t as reliable as you might think.
• Chili powder, ammonia, mothballs, and peppermint oil are commonly used to repel mice, but studies have shown that they are ineffective.
• When using certain scents as mouse repellents, it’s important to be mindful of the potential side effects—for example, high amounts of ammonia can cause kidney or liver damage.
• If you have a severe rodent problem, calling a professional is the most reliable and straightforward way to protect your home.

Jump to section:

• Scents mice hate
• A less smelly way to repel mice

When it comes to mouse control, many people wonder if scent-based methods are enough. If you’ve been searching for how to get rid of mice, you’ve probably seen advice suggesting strong or rancid odors as deterrents. That leads to the big question: what smells do mice hate, and can scents alone really keep them away? Keep reading to discover what smells deter mice and how to use them properly!

Scents mice hate

Using scents mice hate can be a helpful way to discourage them from moving in, but they’re only effective as a supporting measure rather than a stand-alone fix. These scents are often applied as sprays along baseboards or entry points, or by placing soaked cotton balls in spots like attics, garages, or under sinks. They may make a space less appealing to curious mice, but once an infestation is established, food and shelter will outweigh any unpleasant smell—meaning scents alone won’t solve the problem.

Ammonia

Ammonia is one of the stronger scents mice hate because it gives off a smell similar to predator urine, which can signal danger. Homeowners sometimes place small dishes of ammonia near entry points or in areas where mouse activity has been spotted. While this may discourage some mice from exploring those spaces, it’s not a foolproof solution. The scent fades quickly, and because ammonia is a harsh chemical, it can be risky to use around kids or pets. Using ammonia for mice is best used with caution and never as a stand-alone method.

Mothballs

Some people turn to mothballs to repel mice because of their strong odor. The idea is to place them in attics, basements, or storage areas where rodents might sneak in. However, studies show that mothballs are ineffective for long-term rodent control, and mice can grow used to the smell. On top of that, mothballs contain toxic chemicals that can harm people and pets, making them a poor choice for everyday use. While mothballs may seem like an easy fix, they’re not a reliable answer to what smells repel mice.

Chili oil or powder

Chili-based products get their kick from capsaicin, which makes chili peppers hot. Because of this, chili oil or powder can irritate a mouse’s nose and deter them from specific areas. Some people sprinkle chili powder along baseboards or mix chili oil with water to spray near entry points. However, the smell can fade and may not stop the determined mice looking for food or warmth. It’s more of a short-term deterrent than a long-term solution.

Peppermint oil

Peppermint oil is one of the most popular scents that deters mice because it’s natural, easy to find, and pleasant to humans. Homeowners usually soak cotton balls with the oil and place them in cabinets, under sinks, or near suspected entry points. The strong minty smell may help make those areas less attractive to rodents. Still, peppermint oil alone isn’t enough if mice are already nesting in your walls, and it’s always best to consult a professional pest control company.

Vinegar

Vinegar has a sharp odor that can be unpleasant for rodents, which is why it’s sometimes used as a smell to keep mice away. People often soak rags or cotton balls in vinegar and leave them in corners, closets, or small spaces where mice might sneak in. While the sour scent may help discourage activity, it must be reapplied often because vinegar evaporates quickly. It won’t clear out an infestation on its own, but it can play a small role in making your home less inviting to mice.

A less smelly way to repel mice

Using smells to keep mice away can help, but the most reliable way is to make your home less welcoming in the first place. Here are a few simple proactive steps to help keep mice away from your home:

• Seal entry points: Close gaps, cracks, and holes around doors, windows, pipes, and your home’s foundation.
• Keep food secure: Store pantry items in airtight containers and quickly clean up crumbs and spills.
• Declutter and clean: Cut down on hiding spots by organizing storage areas and vacuuming often.
• Maintain your yard: Trim shrubs and trees near your home and clear away woodpiles or debris.
• Fix leaks: Eliminate water sources that can attract rodents.

If you’d rather leave it to the pros, Terminix is here to help! We offer both rodent exclusion and control services designed to help keep your home protected. Schedule a free inspection today and let us handle the dirty work so you don’t have to!