Expert Tips for Mouse & Rat Prevention – Spring 2026

Rodent Pest Control DIY Methods

Cooler weather drives rats and mice indoors in search of warmth and food, making rodent infestations more common. Use the following DIY tips to help protect your home during rodent season.

DIY Rodent Control Tips Overview

Below is a quick overview of practical DIY rodent control tips homeowners can use to reduce mouse and rat activity.

1. Seal Entry Points to Make Your Home a No-Rodent Zone

Here is a pro tip for rodent pest control: a key point of ensuring no mice in the home is searching for any holes in the foundation and walls, especially since mice and rats often live and nest inside house walls, using wall voids as protected travel routes. Mice can make their way into holes only ¼ of an inch in diameter, and both mice and rats can squeeze through tiny gaps because their bones are slender, their joints are flexible, they lack a rigid collarbone, and their skull bones aren’t fully fused, allowing them to compress their bodies significantly, especially their heads, if their nose fits through first. They can fit through small spaces that lead directly into wall cavities. Foundation cracks and joints around windows are particularly vulnerable to cracks and holes that allow rodents access into wall spaces. Other areas to check include weather seals and the edges of garage doors. If your garage is insulated, it may become a cozy home for rodents and a direct pathway into interior walls.

Preventing Rat and Mouse Entry

A good way to fill foundation holes is mortar concrete filler. Windows, doors, and weather seals are easily filled with any basic sealant. If there are larger holes that are harder to fill with sealant, fill them with steel wool, which can be an excellent rodent deterrent and even rodent eliminator. Even if a mouse begins to chew through the wool, they will be dead before they are able to enter.

2. Eliminate Food Sources That Attract Mice and Rats

If you had to pick only one of these best rodent control DIY tips from this blog to follow, it would be to decrease food access to pests. During fall, mice are searching for a food source for the winter. Bird feed is often a mix of ground grains and nuts, something mice are very fond of. Mice can climb up poles to get to the mixture and will stick around if it is accessible.

Mice and Rats May Eat Your Dog’s Food!

Mice also enjoy pet food. Dog food, cat food, etc. If they can get their paws on it, they will not leave. Immediately after buying your pet’s dinner, seal them in containers so you don’t invite a rodent problem on your property.

3. Secure Garbage Bins to Reduce Rodent Activity

Garbage cans and bins kept alongside houses will be a beacon for rats and mice. Mice do not discriminate when it comes to a food source. Rotten food, old veggies, and freezer burnt corn dogs are still good to a mouse. Mice and rats are still able to climb a flat smooth surface. If possible, keep bins far away from your home. If you are unable to do so, there are more solutions to keep control of rodents around garbage. You can put your bins on platforms, secure lids with bungee cords and rocks, or scented oils. Mice and rats are repelled by the smell of peppermint oil, as well as castor oil and citronella oil. Soak cotton balls in these oils and leave them where mice are active to help with home rodent control. However, this is not a long term solution. Rodents can acclimate to smells and oils scents fade rather quickly because of evaporation and if outdoors, wind and sun degrade oils even faster.

4. Maintain Landscaping to Reduce Rodent Hiding Spots

Dense shrubs and gardens planted close to the house provide hiding spots for mice and rats. As they seek for other entry holes, they are able to search without looking around for other threats. Mice can also make nests within or under bushes, considering it is surrounded and protected from the elements. Make sure to trim your garden, and keep plants planted a few inches from the home. If soil levels are too high, mice can squeeze their way into siding and into the home.

5. Keep Floors and Counters Clean of Food Debris

Crumbs or food scraps can invite mice inside. If they aren’t able to find food in your home accessible to them, they will leave your home alone. Make sure to not leave food out, especially overnight. If there is excess food in your pet’s bowl often, this is an invitation for a rodent problem—put it away and seal it.

6. Avoid Antifreeze: Why Antifreeze Is Unsafe for Mouse and Rat Control

Many homeowners search online wondering whether antifreeze can be used to control mice or rats. This question often comes up because antifreeze has a sweet smell and taste that may attract rodents. While mice and rats may investigate or drink antifreeze, using antifreeze for rodent control is extremely dangerous and should never be considered a safe or appropriate solution.

Antifreeze is Dangerous to Wildlife, Animals and Humans

Although using antifreeze to control rodents may seem like a quick fix, it is extremely dangerous. According to the National Library of Medicine, antifreeze is highly toxic to mice and rats and can also seriously harm pets, wildlife, and humans through accidental exposure or secondary poisoning. Because of these risks, DIY antifreeze “solutions” should always be avoided.

Rodents that ingest antifreeze may wander before dying, increasing the risk of secondary poisoning to predators, pets, or scavenging animals. In addition, poisoned rodents can die inside walls or hidden spaces, leading to odor problems and additional pest issues. Because antifreeze is not an approved rodenticide, using it can also create legal and liability concerns. For these reasons, antifreeze and antifreeze-based mouse traps should never be used for rat or mouse control.

Why Antifreeze Should Not Be Used for Mouse or Rat Control

7. Protect Chimneys and Vents to Block Rodent Entry

Chimneys are a very easy access point for mice to make their way inside. Placing vents over chimneys blocks access to the interior of your home. This is an area where you can keep control of rodent’s entry points. If your fireplace is not in use at the time, close the damper to  once again block entry.

8. Install Gutter Guards to Limit Rodent Access

Gutters are in a sense, highways for mice. Through these highways it makes it easier for mice to find their way inside unseen. Gutter guards also keep clutter out, which can also attract mice and other pests. It makes cleaning the gutters much easier, and you won’t have to worry about snow or leaves.

9. Keep the Garage Food Free

As we mentioned before, one of the best rodent control DIY tips is about decreasing access to food in the home…don’t forget the garage. Garages are often entry points for mice. When backing the car from the garage, working inside the garage, or just leaving the door open in general can welcome mice or rats inside. If mice can access any type of food, they are there to stay. Mice will also invite family and friends to enjoy food. The sealant around refrigerators can become old, and mice can easily chew through and access food inside.

10. Pet Cat. Do Cats Help Keep Mice & Rats Away?

If you asked the question what is the best rodent pest control near me?…the answer could be curled up purring on your lap. Cats are natural predators and can be one of the best rodent control options available. After adopting a cat, you will very soon see a large decrease in mice. Cats are also great companions, and aren’t messy. Cats also emit a chemical that deters mice from the home. The chemical is found in cat saliva, which triggers a mouse’s sensory organs and causes fear. Not only will a cat actively take care of the problem, but they will also passively defend as well, making them some of the best rodent exterminators you can have.

Contact Trusted Rodent Control Professionals

With rodent season soon approaching, have a game plan in place. If you need help with your pest control consider using Green Pest Management.

Environmentally Friendly Rodent Control

We offer a pest free guarantee that includes residential and commercial rodent exclusion. If you want eco friendly rodent exterminators in your area with the record to back it up, give us a call for a free quote at (302) 777-2390. 

Frequently Asked Questions

Do mice carry diseases?

Yes — mice can carry diseases that pose health risks to people. Wild mice may harbor zoonotic pathogens (diseases that spread from animals to humans) in their urine, droppings, saliva, or nesting materials, potentially transmitting illnesses such as hantavirus, leptospirosis, Salmonella, and lymphocytic choriomeningitis virus (LCMV) when people inhale contaminated dust or touch contaminated surfaces. These risks make rodent disease prevention, sanitation, and careful cleanup of mouse waste important for minimizing health hazards.

How do mice get into your house?

Mice get into your house through very small structural gaps and openings, often ones people don’t notice. Because a mouse’s tiny body can squeeze through a hole about ¼ inch wide, they can enter through cracks in foundations or walls, unsealed gaps around doors and windows, spaces where pipes or utility lines enter the building, and poorly screened vents or attic openings. Once inside, mice look for food, warmth, and shelter, so unsealed garage doors, pet doors, or gaps under door sweeps are common access points. To prevent infestations, it’s important to seal tiny holes and cracks and ensure all exterior openings are tightly closed.

What do mice eat?

Mice will eat almost anything they can find, especially when living near people. Mice are omnivores. Around homes, they often consume grains, seeds, cereals, nuts, fruits, pet food, and kitchen scraps, but they’ll also nibble on vegetation, roots, insects, and meat if available. This flexible diet helps them survive in varied environments and makes proper food storage and sanitation important for reducing mouse attraction and infestation risks.

Are mice nocturnal?

Yes – mice are mostly nocturnal animals, meaning they are naturally most active at night and tend to rest during the day. This night-focused behavior helps them avoid predators and take advantage of quieter conditions to search for food and shelter. While mice may sometimes be seen during daylight (especially if food is scarce or a large population is present), their instinctive activity peaks after dark and around dusk and dawn.

Can mice climb walls?

Yes — mice can climb walls. House mice are agile climbers that will scale rough or textured vertical surfaces like brick, wood, drywall, or concrete using their sharp claws and flexible bodies, and they’ll also run along wires or cables to reach higher areas in search of food or shelter. Because of this climbing ability, mice can enter homes through openings above ground level and access attics or upper floors. To reduce mouse access, sealing gaps at all heights and removing easy climbing routes can help make structures less accessible to rodents.

What smells do rats hate?

Rats do have a highly sensitive sense of smell and can show temporary aversion to strong odors like peppermint oil, eucalyptus, ammonia, vinegar or clove oil because these scents can overwhelm or irritate their scent receptors. Many people wonder whether strong odors can help keep rats away, but scientific pest-management research shows that while rats may initially avoid certain smells, no scent alone reliably keeps rats out long-term. Repellents based on smells generally work only briefly and rats often acclimate over time, so they shouldn’t be relied on as the sole method of control. Effective rat prevention focuses on sealing entry points, sanitation, and habitat modification rather than just odor deterrents.

Do mice bite?

Yes – mice can bite people, though it’s not very common. House mice are generally timid and will try to flee when disturbed, but if they feel threatened, cornered, or handled directly, they may bite in self-defense, and these bites can break the skin. Because rodent mouths can carry bacteria, any bite should be washed promptly and monitored for infection. While serious infections like rabies are extremely rare in small rodents, bites may still pose minor health risks and warrant basic first-aid attention. 

Do mothballs keep rodents away?

No, mothballs do not keep rodents away. Mice and rats can quickly adapt to the smell, making mothballs ineffective as a long-term rodent control method. Additionally, using mothballs for mouse or rat control is dangerous and illegal in many cases. Mothballs contain toxic chemicals that can harm humans, pets, wildlife, and the environment. For these reasons, mothballs should never be used for rodent removal.

Are Rodents Living in My Walls?

One way to determine whether rodents – such as mice or rats – are living inside your house walls is to look and listen for common warning signs. These include scratching, crawling, or squeaking sounds, especially at night. Additional indicators or rats in walls include tooth marks on walls, chewed wires, and damage to household items. Seeing rodent droppings near walls is also a strong sign of rats or mice in the house.

TL;DR – Quick Summary

• Effective DIY rodent control starts with prevention: seal small entry points, secure chimneys and vents, install gutter guards, and eliminate food sources like pet food, bird seed, garbage, and kitchen crumbs.
• Landscaping maintenance and keeping garages food-free reduce nesting and hiding spots near foundations.
• Strong smells and cats may temporarily deter rodents, but long-term mouse and rat prevention depends on exclusion, sanitation, and habitat modification.
• Avoid dangerous DIY methods like antifreeze or mothballs — they are toxic, illegal in many cases, and pose serious risks to pets, wildlife, and humans.
• Because mice can carry diseases and climb walls to access attics and interior spaces, proactive rodent exclusion and moisture control are critical.
• For persistent infestations or rodents in walls, professional rodent control and exclusion services provide the safest and most reliable solution.

Rodent Control Research Articles & Guides

Antifreeze toxicity study
Doty, R. L., Dziewit, J. A., & Marshall, D. A. — Antifreeze ingestion by dogs and rats: influence of stimulus concentration (Canadian Veterinary Journal).
Antifreeze ingestion by dogs and rats: influence of stimulus concentration

Mouse handling techniques guide (PDF)
UNC Division of Comparative Medicine — Basic Mouse Handling and Technique Guide (University of North Carolina at Chapel Hill).
Basic Mouse Handling and Technique Guide (PDF)

IPM & Pest Management Resources

University of California IPM – Rats Pest Notes
University of California Statewide IPM Program — Rats / Home and Landscape / Pest Notes.
Rats / Home and Landscape / Pest Notes

University of California IPM – House Mouse Guide
University of California Statewide IPM Program — House Mouse / Home and Landscape / Pest Notes.
House Mouse / Home and Landscape / Pest Notes

Species & Biology Articles

House mouse species
Wikipedia — House mouse.
House mouse

Additional Pest Management Guides (Optional References)

Surveillance & management of invading mice
North Carolina Cooperative Extension — Surveillance and Management of Common Structure-Invading Mice (NC State Extension).
https://content.ces.ncsu.edu/surveillance-and-management-of-common-structure-invading-mice

Rats and mice control tips
University of Georgia IPM — Rats and mice: get them out of your house and yard (UGA IPM).
https://ipm.uga.edu/2025/12/19/rats-and-mice-get-them-out-of-your-house-and-yard/

Rodent zoonoses info
Washington State University IACUC — Zoonoses associated with rodents (WSU IACUC).
https://iacuc.wsu.edu/zoonoses-associated-with-rodents/