Rodent Droppings Cleanup and Sanitizing in San Antonio

Droppings are usually the first thing people find, and the last thing they want to touch. Mouse droppings look like dark grains of rice. Rat droppings are bigger, about half an inch, like a fat raisin. Either way, they come with urine you can't see, and the CDC warns that some rodents carry diseases you can catch from that mess.

This page is about cleaning up places in the house you live in: the pantry, under the sink, the garage, closets, a storage room. For a whole attic full of droppings and soiled insulation, see attic cleanup.

Droppings in drawers, cabinets or along baseboards
A musty, sharp smell in a closet or pantry
Shredded paper, fabric or insulation used as nesting
Yellow urine stains on stored boxes or shelving

Why dry sweeping is a bad idea

The CDC's hantavirus guidance is plain about this: don't sweep or vacuum up mouse or rat urine, droppings or nests. Sweeping and ordinary vacuuming throw dust into the air, and that dust is how people breathe in what the rodents left. The safer method is to wet everything first and wipe it up.

The CDC names the deer mouse as the main hantavirus carrier in the United States, and deer mice live in the brush on the edges of Bexar County. You often can't tell from droppings alone which mouse left them, so wet cleaning is the right habit no matter which rodent you had.

The CDC method for small cleanups

For a small spot you can handle yourself, the CDC's steps go like this. If the space has been closed up, like a shed or a storage room, open the doors and windows and leave them open for 30 minutes before you start. Put on rubber, latex, vinyl or nitrile gloves. Spray the droppings and urine with a household disinfectant or a bleach solution until they're soaked. The CDC's mix is 1 part bleach to 9 parts water. Let it soak for 5 minutes. Then wipe it up with paper towels, bag everything, and wash your gloved hands before taking the gloves off.

Ventilate closed spaces for 30 minutes first
Wear gloves and keep kids and pets out
Soak with disinfectant or a 1 to 9 bleach mix for 5 minutes
Wipe with paper towels, bag it, and throw it away
Mop or wipe the area again with disinfectant

Noise in the attic tonight? Talk to someone who handles San Antonio rodents.
Call (210) 955-2948

What a professional cleanup includes

When droppings are spread through a garage, a storage room or a crawl space, a provider brings more gear and time than most people want to spend. A thorough job usually covers:

Confirming the rodents are gone, or trapping the ones that aren't
Wetting and removing droppings, nests and soiled material
Disinfecting shelves, floors and baseboards
Throwing out contaminated boxes, fabric and food
Deodorizing urine spots with an enzyme product
Pointing out the gaps that let them in

Step by step on a typical job

First the technician makes sure the problem is over. Cleaning while mice are still active means a second cleanup in a month. Then they work from the cleanest area toward the dirtiest so they don't track material around. Stored items get sorted: hard plastic and metal can be disinfected, while cardboard, paper and fabric with urine on them usually get thrown out. The area dries, gets a final wipe, and the technician walks you through what was found.

Why it's a bigger job in San Antonio

Garages here do a lot of work as storage. Boxes, holiday decorations, camping gear and pet food sit against the walls for years, and mice can live behind them a long time before anyone notices. By the time someone moves the boxes, the cleanup covers half the garage.

Heat and humidity make urine odor stronger and help mold grow on soiled cardboard. A cleanup in August is less pleasant than one in February, and the smell will tell you which boxes can't be saved.

Questions from callers

Can I use a shop vac on droppings?

Not on dry droppings. The CDC says not to vacuum or sweep them. Wet them first and wipe them up. Professionals sometimes use HEPA-filtered vacuums after wetting.

What bleach mix should I use?

The CDC's guidance is 1 part bleach to 9 parts water, or a household disinfectant. Let it soak about 5 minutes before wiping.

Do I need a mask?

The CDC's steps call for gloves and soaking. For a large or dusty mess, or if you have breathing problems, have a provider do it.

How do I tell mouse from rat droppings?

Mouse droppings are about a quarter inch, rat droppings about half an inch or more. Our droppings identification article has more detail.

Should I keep food that mice got into?

Throw away any food in bags or boxes they chewed. Canned goods can be washed and disinfected on the outside.

Will cleanup stop the mice from coming back?

No. Cleaning removes the mess. Sealing the gaps keeps new mice out. See rodent exclusion.