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How to clean mouse droppings safely
Updated 2026-10-29. Steps come from CDC, the Illinois Department of Public Health and University of Illinois Extension (read on 2026-10-29); items marked Wrenly suggestion are our own advice. Disclosure: Wrenly Home sells house cleaning in the Peoria, IL area. We are not a pest control company, and we don't clean up after rodents (see below).
Short answer: wet it, don't stir it up. Put on rubber or plastic gloves, spray the droppings until very wet with a household disinfectant or a fresh bleach solution (1½ cups of bleach per gallon of water), wait 5 minutes, wipe up with paper towels, bag them, then disinfect the area and wash your hands[1]. Never vacuum or sweep dry droppings: that can put hantavirus into the air you breathe[1][2][4]. In a closed space, air it out for 30 minutes first[1].
Step by step: cleaning up droppings and urine
| Step | What to do | Source |
|---|---|---|
| Air out a closed space first | If the droppings are in a shut-up room, basement, cabin, shed or garage, open the doors and windows for 30 minutes and leave while it airs out. | CDC[1] |
| Put on gloves | Rubber or plastic gloves. A heavy infestation calls for more protection (see below). | CDC[1] |
| Don't vacuum or sweep | Sweeping or vacuuming droppings, urine or nesting material can put tiny virus-carrying particles into the air, and breathing them is the main way people get sick. | CDC[1][2]; IDPH[4] |
| Soak it with disinfectant | Spray the droppings and urine until very wet with a household disinfectant (the label must say "disinfectant") or a fresh bleach solution: 1½ cups of household bleach in 1 gallon of water (1 part bleach to 9 parts water). Let it sit 5 minutes, or as long as the label says. | CDC[1]; IDPH[4] |
| Wipe up with paper towels | Pick up the wet droppings with paper towels and throw them in a covered garbage can that is emptied regularly. | CDC[1] |
| Disinfect the whole area | Mop or sponge the area with disinfectant, and clean every hard surface nearby: floors, countertops, cabinets and drawers. | CDC[1] |
| Wash gloves, then hands | Wash your gloved hands with soap and water or disinfectant before taking the gloves off, then wash your hands with soap and warm water. | CDC[1] |
Mix the bleach solution fresh each time[1]. IDPH gives the same 1½ cups per gallon for areas with droppings and urine[4]. Use a spray bottle so you can soak the droppings without splashing them around, and keep kids and pets out of the room until you're done (Wrenly suggestion).
Carpet, bedding, boxes and dead mice
Do these after the droppings themselves are soaked and removed[1]:
| Item | What CDC recommends |
|---|---|
| Bedding, clothing, stuffed animals | Wash in hot water with detergent; machine dry on high or hang to dry in the sun.[1] |
| Carpet and upholstery | Shampoo with a commercial disinfectant, or a commercial-grade steam cleaner or shampoo.[1] |
| Books, papers, things you can't wet | Leave them outdoors in sunlight for several hours, or in a rodent-free indoor spot for at least 3 weeks (CDC strongly suggests 6).[1] |
| Cardboard boxes | Throw out boxes with urine or droppings on them; plastic, glass and metal containers can be disinfected.[1] |
| Dead mice and nests | Spray with disinfectant, soak 5 minutes, put in a plastic bag (with any used trap), knot it, put that in a second bag, knot it, and throw it in a covered garbage can.[1] |
| Heating and cooling ducts | If mice have been in the ducts, CDC says to call a professional exterminator; duct-cleaning companies know the risks.[1] |
Rodents often carry fleas, so CDC suggests insect repellent on clothing, shoes and hands when picking up dead mice or nests[1]. Snap traps can be reused: submerge the trap with the mouse in disinfectant for 5 minutes, drop the mouse into a bag, then rinse the trap and let it dry[1].
Why the wet method matters: hantavirus
Hantaviruses are carried by rodents. When fresh urine, droppings or nesting material from an infected rodent are stirred up, the virus gets into the air and people breathe it in; it can also enter through cuts or the eyes, nose or mouth[2]. That's why dry sweeping and vacuuming are the steps to avoid[1]. IDPH says the virus is destroyed by detergents and common disinfectants such as diluted household bleach[4].
The disease is rare but serious. CDC counted 890 U.S. cases from 1993 through 2023; 35% of them were fatal and 94% were west of the Mississippi River[3]. In Illinois, IDPH reports one death in 1996 and one case in 2005 who survived; it says cases are most likely in rural areas where the deer mouse lives, in barns, garages, wood piles and other dry, dusty places with rodent droppings[4]. Symptoms show up 5 to 42 days after exposure: fever, headache, stomach pain, muscle aches, cough, and nausea or vomiting. Flu-like symptoms followed by shortness of breath mean call a doctor[4], and tell them about the rodents[1].
Is it a mouse? Signs and droppings
Droppings about the size of a grain of rice are likely a mouse's; bat droppings are similar but piled in one place, while mice scatter theirs. Other signs: scratching or scurrying in walls or ceilings shortly after dark or early in the morning, a urine smell, gnaw marks on food, cardboard and trash cans, and shredded paper or fabric used as nesting[5]. In Illinois it may be the non-native house mouse or a native white-footed or deer mouse; mice move into buildings for shelter, especially in cold Illinois winters[5].
Keeping mice out
- Seal gaps: a mouse can fit through a hole slightly larger than 1/4 inch. Use steel screen, sheet metal, hardware cloth, caulk or weather stripping around windows, doors and garage doors, and steel wool where pipes and wires enter (IDPH[4]; Illinois Extension[6])
- Fit door sweeps that touch the floor; if you can see light under a door, it needs one (Illinois Extension[6])
- Store human and pet food in tightly closed containers, don't leave pet food out, use trash cans with tight lids, and fix leaky faucets (IDPH[4]; Illinois Extension[5])
- Keep the lawn mowed and move wood piles, compost and trash cans away from the house; wood piles at least 12 inches off the ground (IDPH[4])
- Trap with snap traps (IDPH suggests peanut butter mixed with oats as bait) and keep trapping for at least two days after the last catch (IDPH[4]). Illinois Extension recommends against poison baits and sticky traps ([5])
- Renters: document signs of mice and report them to your landlord promptly; local laws may require the landlord to handle it (Illinois Extension[5])
Heavy infestations
A heavy infestation, a vacant house full of rodents, or mice in the heating and cooling ducts is more than a DIY job. CDC lists coveralls, rubber boots or shoe covers, gloves, goggles and a half-mask air-purifying respirator with a HEPA filter for that kind of cleanup, and says to call a professional exterminator for ducts[1]. IDPH says to consult your local or state health department before trying to control a heavy infestation yourself[4]. In Peoria that's the Peoria City/County Health Department, 2116 N. Sheridan Rd., Suite A (309-679-6000)[7].
What Wrenly does and doesn't do
We don't clean up after rodents. Droppings, nests and dead mice fall under pests and biohazards, which aren't included in any Wrenly clean (see what's included), and a cleaner may stop a visit if they find an active infestation. Do the cleanup above yourself, or have a pest control company handle a heavy infestation. Once the mice are gone and the droppings are cleaned up and disinfected, a deep clean takes care of the rest of the house: baseboards, inside the microwave, cabinet fronts, vents and ceiling fans within reach (see the deep cleaning checklist).
What a deep clean costs
Swipe the table sideways to see every price column →
| Home | Deep clean | Then every 2 weeks (optional) |
|---|---|---|
| Studio / 1 bed (1 bath incl.) | $228 | $155 |
| 2 bed (2 baths incl.) | $272 | $189 |
| 3 bed (2 baths incl.) | $350 | $233 |
| 4 bed (3 baths incl.) | $441 | $306 |
| 5 bed (3 baths incl.) | $558 | $337 |
| Each extra bathroom | +$33 | +$20 |
Frequently asked questions
How do you clean mouse droppings safely?
Wet them, don't stir them up. CDC's steps: wear rubber or plastic gloves, spray the droppings and urine until very wet with a household disinfectant or a bleach solution (1½ cups of bleach per gallon of water), let it soak 5 minutes, wipe it up with paper towels, throw them away in a covered can, then disinfect the surrounding surfaces and wash your gloved hands, then your hands. Never vacuum or sweep droppings first.
Can you vacuum mouse droppings?
No, not dry. CDC and the Illinois Department of Public Health both say not to vacuum or sweep rodent droppings, urine or nests before they are soaked with disinfectant, because it can put virus particles into the air. If you already vacuumed, CDC says to follow its cleanup steps from there.
Are mouse droppings dangerous?
They can be. CDC says hantavirus spreads mainly when fresh urine, droppings or nesting material of an infected rodent are stirred up and the virus gets into the air you breathe. Hantavirus disease is rare: CDC counted 890 U.S. cases from 1993 through 2023, 94% of them west of the Mississippi River, but 35% were fatal. Illinois has reported a 1996 death and a 2005 case that survived (IDPH). Mice can also spread bacteria and allergens in urine and droppings (Illinois Extension).
What do mouse droppings look like?
Illinois Extension says droppings about the size of a grain of rice (roughly a quarter inch long) are likely from a mouse. Bat droppings are similar in size but usually piled in one spot, while mice scatter theirs as they move around.
What should I do if I find mouse droppings in my house?
Clean them up with the wet method on this page, then find out how the mice are getting in. IDPH: take away food, water and nesting spots, seal gaps (a mouse can fit through a hole slightly larger than 1/4 inch), and use snap traps, continuing for at least two days after the last mouse is caught. If you rent, Illinois Extension says to document what you find and report it to your landlord promptly.
What are the symptoms of hantavirus?
IDPH lists fever, headache, stomach pain, muscle aches, cough, and nausea or vomiting, appearing 5 to 42 days after exposure. Flu-like symptoms followed by shortness of breath mean call a doctor, and tell them about the rodent exposure. In Peoria, questions about your situation can go to the Peoria City/County Health Department (309-679-6000).
Does Wrenly Home clean up mouse droppings?
No. Rodent droppings, nests and dead mice fall under pests and biohazards, which aren't included in any Wrenly clean, and a cleaner may stop a visit if they find an active infestation. Clean them up yourself with CDC's steps, or have a pest control company deal with a heavy infestation. Once the mice are gone and the droppings are cleaned up and disinfected, we can deep clean the rest of the house.
Sources
- CDC, Healthy Pets, Healthy People: How to Clean Up After Rodents (Apr 8, 2024). https://www.cdc.gov/healthy-pets/rodent-control/clean-up.html. Accessed 2026-10-29.
- CDC: Hantavirus Prevention (May 13, 2024). https://www.cdc.gov/hantavirus/prevention/index.html. Accessed 2026-10-29.
- CDC: Reported Cases of Hantavirus Disease (Jun 26, 2024). https://www.cdc.gov/hantavirus/data-research/cases/index.html. Accessed 2026-10-29.
- Illinois Department of Public Health: Hantavirus. https://dph.illinois.gov/topics-services/diseases-and-conditions/diseases-a-z-list/hantavirus.html. Accessed 2026-10-29.
- University of Illinois Extension, Illinois Wildside: Mouse in the house? (Feb 19, 2026). https://extension.illinois.edu/blogs/illinois-wildside/2026-02-19-mouse-house. Accessed 2026-10-29.
- University of Illinois Extension, Good Growing: Tips for keeping pests out of your home (Sep 29, 2023). https://extension.illinois.edu/blogs/good-growing/2023-09-29-tips-keeping-pests-out-your-home. Accessed 2026-10-29.
- Peoria City/County Health Department (contact page). https://www.pcchd.org/. Accessed 2026-10-29.
General home-care information drawn from the sources above, not medical or pest-control advice. Follow the label on any disinfectant, and never mix cleaning products. If anything here is out of date, email hello@wrenlyhome.com and we'll correct it.