Struggling with a rat infestation can be frustrating, but long after the rodents are eliminated, the odour itself can make you feel very uncomfortable in your home. Usually, this odour was caused by rat urine, droppings or even the decomposing rodent body itself. If left alone, they will linger in your home. Here are my step-by-step instructions to eliminate these smells and keep the home fresh, as well as long-term tips for control of the rat pest.

Identify and Remove All Contaminated Materials

The initial aspect in removing the smell is to find and remove everything the rats made a mess of. This could include:

Contaminated insulation in the attic or crawl spaces
All cardboard boxes and fabrics they chewed up.
Nesting materials: shredded paper or cloth
Food packaging and pantry items they chewed or ate.

Rats urinate and poop wherever they travel, and the urine and poop will quickly penetrate porous materials. Wear gloves and a mask when handling contaminated items, remove them and place them in sealed trash bags, and get rid of them properly. This contains the odour from spreading further and removes the source of the problem.

Deep Clean and Disinfect Affected Areas

Now that you have dealt with the contained materials, it is time to thoroughly clean. Scrub and disinfect all surfaces that rats have contacted, such as floors, baseboards, shelves, and walls.

For hard surfaces, a bleach solution (1 part bleach to 10 parts water) should work fine.
For wood, fabrics, or other sensitive surfaces, enzyme-based cleaners are a safer option because they will clean by destruction of organic matter whilst safeguarding the surface.
While cleaning, ensure that the space is well ventilated. Open windows and turn on fans to ventilate the area.

This is a very important step, as not only will it eliminate the smell, but it will also deactivate harmful bacteria left by rats. Sufficient cleaning is one of the most important steps in the rat pest control process.

Use Odour Neutralisers and Natural Deodorisers

Post-cleaning some odours can still remain in the air. That’s where odour neutralisers come in. Don’t just cover the odour. Choose neutralising products, which absorb and neutralise odours.

Baking soda – Place the open bowls in the affected area to help absorb smells.
Activated charcoal – Very effective at pulling odours out of the air.
Enzyme-based Deodorising – Are designed to break down the organic compounds causing the smell.
Essential oils – Lavender, eucalyptus, or tea tree oil can create a natural freshness.

For large areas such as attics or basements, deodorising bags or foggers can be extremely effective for restoring clean air.

Check for Dead Rats or Hidden Nests

If the stink is still coming through after cleaning and deodorising, there may still be a hidden odour source sitting dead in the house, perhaps a dead rat or a nest, hiding behind drywall or under floorboards.

Signs to look for:

The smell gets stronger in one specific area.
You are observing an unusual number of flies or other insects in one particular area.
You are observing wet stains or discolouration on walls or ceilings.

There is a dead animal carcass that appears to be hidden from sight; it is a good idea to call professionals if you are not able to find it. Experienced rat pest control professionals will have the tools to safely locate and remove the hidden sources of odour without causing any unnecessary damage to your house.

Prevent Future Infestations with Proper Sealing

Prevention is key. A future cure is all you need. After a clean, odour-free home, the last thing left is another infestation.

Seal entry points: rats can get in through small gaps and holes. Seal them with steel wool, caulk, or metal mesh to block gaps around pipes, vents, and foundation cracks.
Store food securely: store food items in airtight containers, and make sure trash bins are covered with tight lids.
Remove objects that provide shelter: cardboard boxes, wood, and old clothing are good nest setups.
Maintain outside areas: trim back overgrown bushes and clean up debris close to your home’s foundation.

You can also contact rat control professionals, as they provide specialised services. They inspect your house thoroughly, locate the entry points and ensure you properly seal them.

Final Thoughts

The smell from a rat infestation can feel unbearable! However, if you take the following steps, your home can feel fresh and clean again.

Remove any contaminated material.
Deep clean and disinfect.
Use natural and commercial odor neutralizers.
Look for dead rats or nests that may be hidden.
Seal entry points where rats enter your home to stop future infestations.

If the natural odors are still lingering and the infestation was severe, don’t hesitate to call a professional rat pest control service. Companies like Critter Control® of Lake County can provide rat removal, cleaning, sanitizing and sealing so you don’t have to deal with the problem twice.