Peppermint oil and peppermint spray are commonly suggested as natural remedies to repel rats and mice. However, the effectiveness of peppermint as a deterrent is a topic of debate.

While some people claim that peppermint scent repels rodents due to its strong odor, there is limited scientific evidence to support this claim. The few studies conducted on this topic have produced mixed results, with some showing a mild repellent effect and others showing no significant impact on rodents.

It's important to note that rats and mice are highly adaptable creatures, and they may become accustomed to certain scents over time. Additionally, factors such as the severity of the infestation, availability of food and shelter, and the specific species of rodents can influence the effectiveness of any repellent method, including peppermint.

If you're dealing with a rat or mouse problem, it's generally recommended to focus on comprehensive pest control measures rather than relying solely on peppermint spray. Here are some steps you can take:

1. Seal entry points: Inspect your home for any gaps or cracks that rodents can use to gain access. Seal them with caulk or other appropriate materials.

2. Remove food sources: Ensure that all food items are stored in sealed containers, and clean up any spills or crumbs promptly. This reduces the attractiveness of your home to rodents.

3. Maintain cleanliness: Keep your home clean and clutter-free. Regularly sweep and vacuum to eliminate potential hiding spots.

4. Set traps: Place snap traps or live traps in areas where you suspect rodent activity. Bait the traps with appropriate food items to lure them in.

5. Consult a professional: If the infestation persists or becomes severe, it's advisable to contact a pest control professional who can assess the situation and provide effective solutions.

Remember, prevention and early intervention are key to managing rodent issues. Taking a holistic approach to pest control will yield better results than relying solely on peppermint spray.