How To Get Rid Of Dead Mouse Smell

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Have you noticed a rotten odor like urine, feces, and dead animals? You may have a dead mouse on your hands.

There are many effective ways to rid your house of the dead mouse smell including finding the mouse and using the right tools and cleaning products to dispose of the smell. 

Perhaps the most challenging part about removing the smell is finding the dead mouse first. Don’t fret; everything you need to know about getting rid of the dead mouse smell is just a few minutes away. 

What Does a Dead Mouse Smell Like?

Over the process of decomposition, a dead mouse has many different odors. Which leads to the question, how long does it take for a mouse to decompose? 

In short, it can take up to three weeks or more for a mouse to decompose. The decomposition process solely relies on how big or small the mouse is, the temperature in which place they died, and how accessible to insects the mouse is. 

Throughout decomposition, the dead mouse will smell like:

  • At first, you may smell sulfur similar to burning matches or rotting eggs
  • After a few days, you may smell methane similar to paint thinners
  • Usually, the odor will smell like ammonia (bleach products) and urine
  • Before the smell goes away, the dead mouse will smell like sour, rotting food

Are Dead Mice Dangerous?

While a dead mouse can’t cause any more damage or hurt you, they carry diseases such as salmonella and lymphocytic choriomeningitis (LCMV). 

Parasites are dangerous to human health. Mice and rodents usually carry parasites within their bodies. So, when they die, these parasites escape the carcass and find their next host.

Many people wonder, is it bad to inhale dead mouse smell? Yes, their odor after death can become toxic and cause illnesses such as hantavirus.

How to Locate a Dead Mouse in Your Home

If you find that your home reeks of dead mice, that’s a sure sign you have had a mouse infestation. The best way to find where the dead mice are is to find their nest by tracking their habits. 

Mice reside in undisturbed areas where food is accessible only ten feet away. Mice can live in wall cavities, crawl spaces, abandoned furniture, and cluttered areas of your home.

First, follow the stench of a dead mouse to the room where it’s at its worst. Next, look in areas such as: 

  • Under furniture
  • Behind appliances like the stove or fridge
  • Search for holes in your walls or foundation
  • Look for mouse droppings
  • Neglected areas of the room

How Long Does Dead Mouse Smell Last?

Many people wonder how long does it take for a dead mouse to stop smelling?

From the time a mouse dies to the time they decompose is the amount of time where a dead mouse’s smell will linger. 

Usually, this process takes anywhere between two weeks to a month. While this is an unsettling feeling for most, there are ultimate ways to get rid of the smell for good. 

How to Get Rid of Dead Mouse Smell

The first step is finding where the mice are located within your home. Look for mouse tracks, droppings, nesting supplies, and crumbs in small or hard-to-reach areas of your property. 

Once you find the invasion, you’ll know the dead mouse is somewhere near that area. After finding the dead mouse, you’ll need protective gear to dispose of the mice and proper cleaning supplies.

Dispose of Dead Mice Properly

It is essential to take note of the clothes you are wearing when disposing of a dead mouse. Never touch them with your bare hands or get them on or near your clothing. 

First, ensure you wear gloves, protective footwear, and a mask to avoid breathing in any feces or disease. Next, use disposable tongs or a plastic bag to pick the dead mouse up and seal it away in a tightly closed bag.

After removing the dead mouse from the area, you can throw it in the garbage disposal outside your home.

Use Proper Cleaning Methods and Tools

After discarding the mouse, ensure you thoroughly disinfect and bleach clean the area. Rid any feces or mice nest remnants and sweep and mop the area more than once. 

The trick is to eliminate the smell to prevent a mouse infestation from happening again. Clean all surfaces and walls of the room where the dead mouse was found. 

Air Out Your Home

While cleaning and disposing of mouse remnants, ensure that you leave a window open for enough ventilation; otherwise, you’ll risk getting sick.

Keep your windows open for at least two days after the area is entirely cleaned well and there is only the smell of cleaning products. 

If, after two days, you close the window and the smell returns, there are more dead mice to be found, in which case you’ll need to repeat the process. 

Call Professional Services

After you have done all that you can, it may be best to call a rodent exterminator to inspect your property, ensuring you haven’t missed anything.

If the smell continues to come back, a professional in mice pest control will be able to rid the smell, dispose of infestations, and let you know where they came in. 

What if the Mouse is Trapped in the Wall Cavity?

If you suspect a dead mouse within your wall cavity, the only solution is to contact professional services. 

An exterminator will know where the dead mouse smell is coming from in the wall and be able to rid your walls of the mouse with minimal damage. 

It is never okay to leave the dead mouse inside the wall. After the smell has vanished (roughly three weeks), the damage to your health doesn’t stop. You’ll likely end up with respiratory problems that become chronic problems. 

Preventing the Smell in the First Place

To prevent the dead mouse smell from returning, you’ll want to set up precautions to prevent mice from returning to your home. 

Prevention methods include:

  • Keeping your property clean and uncluttered
  • Fix small holes or crack in the foundation
  • Make cleanliness a daily chore — don’t leave it
  • Plant mint gardens 
  • Get a cat


Having mice, and dead mice, in your home will cause serious health problems. The fastest and easiest way to rid your home of a dead mouse smell is to call a professional at Hama pest control services

If you feel that you are capable of discarding the smell yourself, before calling a professional, ensure you always wear protective gear to prevent illness from the disease mice carry.

Jake Garza
Jake Garza
Jake is the founder of Hama Pest Control, the preferred choice for pest removal and extermination in the Greater Toronto Area. With over thirty years of experience, Jake prides himself in bringing quality, knowledge, and care to Hama Pest Control's customers.
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