The most effective rodent control combines exclusion, sanitation, trapping and monitoring. Seal entry points, remove food and water sources, position snap traps along travel routes, and inspect regularly. Poison should not be the first or only measure because it can expose children, pets and wildlife to toxic bait or poisoned carcasses.

For a heavy infestation, rodents inside walls or ceilings, contamination in air ducts, or activity that continues after trapping, hire a qualified pest control professional.

Rodent Control at a Glance

Problem Best first action
One or two mice indoors Seal gaps and set snap traps
Ongoing mouse activity Combine exclusion, sanitation, trapping and monitoring
Rats in a basement, crawl space or yard Inspect burrows and entry routes, then use professional treatment where appropriate
Rodents in walls, ceilings or ductwork Contact a pest control or duct-cleaning professional
Droppings, urine or nesting material Disinfect before removal. Do not sweep or vacuum dry waste
Children, pets or wildlife on the property Avoid loose poison. Use products and bait stations only as directed on the label

How Do You Get Rid of Rodents?

Use four measures together: seal entry points, remove food and water, trap rodents, and monitor for fresh activity.

1. Find and Seal Entry Points

Rodent exclusion is the basis of long-term control. A house mouse can enter through a gap about 1/4 inch, or 6 millimeters, wide, which is approximately the width of a pencil. Inspect foundations, doors, windows, utility pipes, vents, rooflines, garages, crawl spaces and attic openings.

Use rodent-resistant materials such as:

  • Steel wool secured with caulk for small gaps
  • Hardware cloth, metal screening, sheet metal or cement for larger openings
  • Door sweeps beneath exterior doors
  • Metal mesh around pipes, cables and vents
  • Properly fitted screens over attic and crawl-space vents

Expanding foam or caulk alone may not provide a lasting repair for larger openings. Rodents can chew through or push aside weak materials. Use metal, cement or hardware cloth as the main barrier, then seal the edges.

2. Remove Food, Water and Shelter

Rodents stay where they can regularly find food, moisture and nesting areas. Store food, pet food, birdseed and animal feed in thick plastic, metal or glass containers with tight-fitting lids. Clean crumbs and spills promptly, and do not leave pet food or water bowls outside overnight.

Reduce outdoor attractants by:

  • Keeping garbage in containers with tight-fitting lids
  • Cleaning grills and outdoor cooking areas
  • Fixing leaking pipes and faucets
  • Removing brush, clutter, discarded tires and unused vehicles
  • Raising firewood at least 12 inches off the ground
  • Keeping woodpiles and compost away from the home
  • Trimming dense vegetation near buildings

Sanitation will not remove an established infestation by itself. It makes the property less attractive and helps exclusion and trapping work better.

3. Use Snap Traps Indoors

For a common indoor mouse problem, snap traps are usually the most direct control method. Place traps along walls, behind appliances, near droppings, inside cabinets and close to suspected travel routes. Rodents generally move beside walls and objects rather than across open floors.

Use enough traps to cover the active area instead of placing one trap in the middle of a room. Keep every trap away from children and pets, and check the traps frequently.

Live-catch traps do not solve the problem on their own. A rodent released outside can return if the building still has an open entry point. The EPA lists snap traps, live traps and poison bait stations as control options, but recommends addressing food, water and shelter conditions first.

Should You Use Rat or Mouse Poison?

Use rodenticide cautiously and only according to the product label. In the United States, consumer rodenticide products are sold in ready-to-use bait stations with block or paste bait. Keep poison away from children, pets and non-target wildlife.

Poison may be considered when:

  • Trapping is impractical in an inaccessible area
  • Rodent activity is outdoors or around a commercial property
  • A professional has identified the species and activity pattern
  • Bait can be secured inside an appropriate tamper-resistant station

Poison is a poor standalone measure when entry points remain open. It may kill individual rodents without stopping new rodents from entering. Poisoned rodents can also die inside walls or ceilings, creating odor and removal problems. Some rodenticides can harm pets, predators and scavenging wildlife if the bait or poisoned carcass is consumed.

Never place loose bait where children, pets or wildlife can reach it. Never use a product in a way that conflicts with its label.

What Are the Signs of a Rodent Infestation?

Common signs of a rodent infestation include:

  • Droppings in cabinets, drawers, pantries or along walls
  • Gnaw marks on food packaging, wood, plastic or electrical wiring
  • Scratching or scampering sounds at night
  • Greasy rub marks along walls or baseboards
  • Shredded paper, insulation or fabric used as nesting material
  • Burrows near foundations, sheds, woodpiles or dense vegetation
  • Unusual pet interest in walls, cabinets or crawl spaces
  • Strong ammonia-like odors from concentrated urine

Fresh droppings, new gnawing and repeated nighttime sounds indicate current activity. A single old dropping does not prove that rodents are still present, so use inspection and monitoring to confirm activity.

How Should You Clean Rodent Droppings and Urine?

Do not sweep or vacuum dry droppings, urine or nesting material. Disturbing contaminated material can put particles into the air. Instead, ventilate the area, wear rubber or plastic gloves, soak the waste with disinfectant, let it sit according to the product instructions, and wipe it up.

For a routine home cleanup:

  1. Open doors and windows, then leave the area for approximately 30 minutes.
  2. Put on rubber or plastic gloves.
  3. Spray droppings, urine, nesting material and surrounding surfaces with disinfectant.
  4. Let the disinfectant soak for five minutes, or follow the product label.
  5. Wipe up the material with paper towels.
  6. Place the waste in a plastic bag, seal it, and place that bag inside a second bag.
  7. Discard the sealed bags in a covered garbage container.
  8. Wash your gloved hands before removing the gloves. Then wash your bare hands with soap and water.

Contact a professional for heavy infestations, extensive contamination, contaminated insulation or rodents inside heating and cooling ducts.

When Should You Hire a Rodent Control Professional?

Hire a professional when:

  • You hear rodents but cannot locate them
  • Rodents are inside walls, ceilings, attics or ductwork
  • You find substantial amounts of droppings or nesting material
  • Rats are burrowing under a building or around utility lines
  • Electrical wiring may have been damaged
  • The infestation continues after sealing and trapping
  • A child, pet or wild animal may have contacted rodenticide
  • The property is a restaurant, food business, rental building or commercial site
  • You cannot safely clean the contaminated area

A professional service should identify entry points, determine whether the pest is a mouse or rat, remove conditions that support the infestation, install traps or bait stations safely, and provide follow-up monitoring. Poison alone does not address the source of the problem.

A Practical Rodent Control Plan

For most homes, use this order:

  1. Inspect the building inside and outside.
  2. Seal gaps, beginning with openings at least 1/4 inch wide.
  3. Remove food, water and nesting materials.
  4. Set snap traps along active travel routes.
  5. Clean contamination safely with disinfectant.
  6. Monitor for fresh signs over the following days.
  7. Call a professional if activity continues or rodents are inaccessible.

This sequence provides more lasting control than repeatedly setting traps or placing poison while leaving entry points open. The EPA describes integrated pest management as a combination of prevention, reduced-risk treatment and properly applied pest control products.