To get rid of mice from a garage, remove food and nesting materials, close the gaps they use to enter, and use traps to catch mice already inside. Before you begin, keep children and pets away from droppings and traps, and plan to clean contaminated areas safely rather than sweeping or vacuuming them.
What You’ll Need
- Work gloves and a well-fitting disposable mask for cleanup
- Snap traps sized for mice, or other traps used according to their instructions
- A small amount of suitable bait, such as a dab of peanut butter, if the trap instructions allow it
- Sealant and materials such as metal mesh or hardware cloth for suitable gaps
- Rigid, lidded containers for stored food, birdseed, pet food, and other attractants
- Paper towels, disinfectant labeled for the surface, and a garbage bag
- A flashlight for inspecting corners, shelving, and the garage door edges
Choose traps and repair materials that suit your garage and follow their labels. Avoid handling traps or contaminated items with bare hands. If you find extensive droppings, a dead rodent in an inaccessible space, or signs of a larger infestation, consider getting help from a pest professional.
Step-by-Step
- Look for signs and likely routes. Inspect the floor edges, corners, storage shelves, workbench, and the area around the garage door. Look for droppings, chewed packaging, shredded paper or fabric, nesting material, and rub marks along walls. A mouse may travel close to a wall or behind stored items, so check sheltered routes as well as open floor space. Use a flashlight, and avoid touching suspected nesting material during inspection.
- Remove easy food sources. Take food, pet food, birdseed, and similar materials out of thin bags or cardboard boxes. Store them in sturdy containers with tight-fitting lids. Clean up spilled seed, crumbs, and dry pet food, and do not leave bowls or open bags in the garage overnight. If you use the garage for rubbish or recycling, make sure containers close securely and rinse food residue from recyclables where practical.
- Reduce clutter and nesting opportunities. Move items off the floor where you can, and sort through piles of paper, cloth, cardboard, and packaging. Discard materials that are no longer needed, especially if they are soiled or chewed. Put remaining belongings in closed containers or on shelves. Keep the space around walls accessible so you can check for activity and place traps without reaching blindly into piles.
- Set traps along active routes. Place mouse traps where you have seen droppings or damage, especially beside walls and behind objects along a route. Follow the trap directions for setup and bait; use only a small amount if bait is recommended. Keep traps out of reach of children, pets, and non-target wildlife. Do not put a trap where a person could step on it or where it could be disturbed by a moving vehicle, door, or stored equipment.
- Check traps and reset as needed. Inspect traps regularly, following the product instructions and local guidance for handling a captured mouse. Wear gloves, and avoid direct contact. If a trap has not caught anything, do not assume mice have left: check whether the bait has been removed, whether the trap is on a route, and whether another food source is more attractive. Move or reset it according to its instructions.
- Seal entry points once you have identified them. Check around the garage door, service doors, vents, pipes, cables, and the foundation. Mice can use surprisingly small openings, so inspect closely rather than looking only for obvious holes. Repair gaps with durable materials suited to the location; metal mesh or hardware cloth can help block openings where appropriate, with a compatible sealant to secure the repair. Do not block a vent or interfere with a door’s safe operation. For a garage door that does not close evenly, repair or adjust the door and its weather seal rather than relying on a temporary obstruction.
- Clean droppings and contaminated surfaces safely. Keep children and pets away. Put on gloves and a mask, then wet droppings and urine-marked areas thoroughly with an appropriate disinfectant, following its label and allowing the stated contact time. Wipe the material up with paper towels and place waste in a bag for disposal according to local guidance. Do not dry-sweep or vacuum droppings, since that can spread contaminated particles into the air. Clean the surface afterward as appropriate for its material, and wash your hands after removing gloves.
- Keep checking for renewed activity. Continue inspecting the garage for fresh droppings, gnawing, disturbed bait, and new gaps. Keep food sealed and the floor as clear as practical. If signs persist after you have removed attractants, trapped mice, and repaired entry points, reassess the inspection and consider professional help. Mice may be entering through a place that is hidden behind shelving or connected to the home.
Common Mistakes
- Using poison as the first response. Rodenticide can endanger children, pets, and wildlife if misused, and a mouse may die in a wall or other inaccessible place. If you consider any pesticide, use only a product permitted for the setting and follow its label exactly. Trapping and exclusion make it easier to monitor results and remove a captured mouse.
- Putting traps in the middle of the floor. Mice often use protected edges and routes. A trap in an exposed spot may be less likely to be encountered. Place it by evidence of activity, while keeping it safely out of reach.
- Sealing holes without checking for active mice. Closing an entry point is important, but sealing a route while mice remain inside can leave them trapped in the garage or in a wall void. Use traps and monitor activity as you make repairs.
- Cleaning droppings dry. Sweeping or vacuuming can stir contaminated material into the air. Wet it with disinfectant first and wipe it up using protective gear and the product directions.
- Leaving clutter or food in place. A few traps may not solve the problem if food, nesting material, and easy access remain. Combine trapping with cleanup, secure storage, and repairs.
Tips
- Take a photo of suspected entry points or droppings before moving items. This can help you compare areas during later inspections.
- Check stored belongings before bringing them into the house, especially if packaging has been chewed or soiled.
- Keep firewood, garden supplies, and other materials organized and away from the garage walls when practical.
- Use a door sweep or weather seal only if it fits correctly and does not prevent the garage door from closing or operating safely.
- Read the labels for traps, disinfectants, sealants, and any pest-control product. Instructions and safe use can differ by product and surface.
- If the garage connects directly to living space, inspect the connecting door and nearby gaps too. Keep that door closed and in good repair.
Troubleshooting
There are droppings, but no mouse is caught. The trap may be away from the mouse’s route, or food elsewhere may be more appealing. Recheck walls, shelves, and sheltered corners for fresh signs, secure other food, and relocate or reset traps according to their instructions. Avoid scattering traps where they create a hazard.
New droppings appear after you seal a hole. Look for another entry point, including around the garage door, pipes, vents, and the shared wall with the house. Mice can use concealed routes. Keep trapping and inspecting, and ask a pest professional to assess persistent activity or difficult-to-access spaces.
A mouse is caught in a trap. Keep people and pets away, wear gloves, and follow the trap’s disposal and cleaning directions. If you are unsure how to handle the trap, or if the mouse is in a location that is unsafe to reach, contact a pest professional rather than handling it directly.
You find a nest or a large amount of contaminated material. Do not disturb it or clean it dry. Limit access, ventilate the area if you can do so without spreading dust through the home, and seek local public-health or pest-control guidance on cleanup. Extra caution is appropriate where droppings are extensive or the space is poorly ventilated.
You hear activity in a wall or ceiling. Traps in the open garage may not reach mice in a void. Avoid cutting into the wall or blocking a suspected route without knowing what is inside. A pest professional can help locate the route and advise on safe removal and repair.
Frequently Asked Questions
How do I know if mice are still in the garage?
Fresh droppings, new gnaw marks, disturbed bait, or newly shredded nesting material suggest continued activity. Check the same areas regularly and distinguish new signs from old ones before deciding the problem is resolved.
What is the best place to put a mouse trap?
Put it beside a wall or sheltered route where you have seen signs, not in an exposed traffic area. Follow the trap directions and keep it inaccessible to children, pets, and other animals.
Should I use poison in a garage?
Poison may create risks for people, pets, and wildlife, and a mouse can die somewhere you cannot reach. Start with food control, trapping, and sealing. If you use a pesticide, follow its label and applicable local guidance carefully.
Can I vacuum mouse droppings?
No. Do not sweep or vacuum them dry. Wet them with a suitable disinfectant, follow the label’s contact instructions, and wipe them up with gloves and a mask.
When should I call a pest professional?
Get professional help if activity continues despite cleanup, trapping, and repairs; if mice are in walls or other inaccessible areas; or if you find extensive contamination. A professional can assess entry routes and recommend a plan for the specific space.
How can I stop mice returning?
Keep food and rubbish secured, reduce clutter, inspect the garage door and utility openings, and repair gaps with suitable durable materials. Continue checking for fresh signs so you can address a new problem early.