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Yes, you can often clean a mattress that has been urinated on. The best results come from acting quickly, removing as much liquid as possible, using a cleaner made for urine, and drying the mattress completely.
A small, fresh accident is usually easier to handle than urine that has soaked deep into the mattress. Older stains may need more than one treatment.
What You Will Need
Gather a few basic supplies:
- Clean white towels or paper towels
- Cool water
- A spray bottle
- An enzyme cleaner made for urine
- Baking soda
- A vacuum with an upholstery attachment
- A fan, if available
- Waterproof gloves, if preferred
An enzyme cleaner breaks down the material that causes urine stains and odors. Check the product listing before using it on a mattress. Test it on a hidden area first, especially if the mattress cover has color or special fabric.
How to Clean Fresh Urine From a Mattress
1. Remove the Bedding
Take off the sheets, mattress pad, protector, blankets, and any other wet bedding.
Check each care label before washing. Wash urine-soaked items separately when practical. Do not dry them with heat until the odor is gone, since heat may make lingering smells harder to remove.
2. Blot Up the Liquid
Press clean towels firmly into the wet area. Lift the towels, move to a dry section, and press again.
Do not rub or scrub. Rubbing can spread the urine across a larger area and push it deeper into the mattress.
Keep blotting until the towels are picking up very little moisture.
3. Apply an Enzyme Cleaner
Follow the instructions on the cleaner. Use enough to reach the affected area, but do not soak the whole mattress.
Urine can travel below the visible wet spot. Treat slightly beyond the edge of the stain.
Let the cleaner sit for the amount of time listed on the product label. Some cleaners need only a short contact time. Others must remain damp longer to work properly.
4. Blot Again
Use fresh towels to absorb extra cleaner and moisture. Press down firmly rather than rubbing.
For a foam mattress, be especially careful not to add too much liquid. Foam can hold moisture deep inside and may take a long time to dry.
5. Cover the Area With Baking Soda
Sprinkle a generous layer of baking soda over the damp section. Baking soda helps absorb moisture and reduce leftover odor.
Leave it in place for several hours. Leaving it overnight may be helpful when the mattress is quite damp.
Keep children and pets away from the treated mattress during this time.
6. Vacuum the Mattress
Once the baking soda is dry, vacuum it slowly with an upholstery attachment.
If the powder still feels damp or clumps together, allow more drying time before vacuuming.
7. Dry the Mattress Completely
Stand the mattress on its side when possible so air can reach more of the surface. Point a fan toward the cleaned area and open windows if weather and room conditions allow.
Do not put sheets back on until the mattress feels fully dry and has no cool or damp spots.
Drying may take many hours. A thick foam mattress may need longer than an innerspring mattress.
How to Clean Dried Urine From a Mattress
A dried stain may still contain odor-causing residue, even when the mattress no longer feels wet.
Start by applying an enzyme cleaner according to its label. The cleaner needs to reach the same depth as the original urine, but the mattress should not be flooded with liquid.
Allow the product to work for the recommended time. Blot the area, cover it with baking soda, and let it dry fully. Vacuum the powder afterward.
You may need to repeat the process once or twice. Let the mattress dry between treatments. Repeatedly soaking the area without enough drying time can create a new moisture problem.
Can You Use Vinegar?
A diluted vinegar solution is sometimes used for light odors, but it may not remove all urine residue. An enzyme cleaner is usually the more practical choice because it is made to break down urine-related stains and smells.
If you use vinegar, first check the mattress maker’s cleaning guidance. Test a small hidden area and avoid saturating the mattress.
Do not mix vinegar with bleach or other household cleaning products.
Can You Use Hydrogen Peroxide?
Hydrogen peroxide may lighten some stains, but it can also fade or discolor mattress fabric. It may not be suitable for every mattress cover.
Check the manufacturer’s guidance and test a hidden spot first. Never mix hydrogen peroxide with vinegar, bleach, ammonia, or other cleaners.
An enzyme cleaner is a simpler starting choice for most urine accidents.
What Not to Do
Do Not Scrub the Mattress
Scrubbing spreads moisture and may damage the surface fabric. Use firm blotting instead.
Yes, you can often clean a mattress that has been urinated on; a standard mattress protector is often easier to remove, wash, and put back on.
Do Not Pour Water Over the Stain
Extra water can carry urine deeper into foam and padding. Use a light, controlled amount of cleaner.
Do Not Use High Heat
Avoid hair dryers, heaters, and steam cleaners unless the mattress manufacturer specifically allows them. High heat may damage foam, adhesives, fabric, or waterproof layers.
A room fan and steady airflow are safer for most mattresses.
Do Not Cover a Damp Mattress
Putting a protector or fitted sheet over a damp mattress traps moisture. Wait until the mattress is fully dry.
Do Not Mix Cleaning Products
Combining cleaners can create dangerous fumes or damage the mattress. Use one treatment at a time and follow its label.
Cleaning Different Types of Mattresses
Memory Foam Mattresses
Memory foam absorbs liquid easily. Use as little cleaning solution as possible while still treating the affected area.
Blot thoroughly and allow plenty of drying time. Standing the mattress on its side can help air move around it, but follow the manufacturer’s handling guidance.
Innerspring Mattresses
An innerspring mattress may have foam and fiber layers above the coils. Urine can still soak into these layers.
Treat the surface carefully and dry the mattress well. Avoid pouring cleaner into the mattress, since liquid can settle inside.
Hybrid Mattresses
Hybrid mattresses combine foam with springs. Clean them much like foam mattresses: use controlled moisture, blot well, and allow a long drying period.
Mattresses With Removable Covers
A removable cover may be washable, but do not assume it can go into a washing machine. Removing a cover may also affect how it fits afterward.
Check the care label and mattress manufacturer’s instructions before unzipping or washing it.
How to Remove a Lingering Urine Smell
If the mattress smells after the first cleaning, first make sure it is completely dry. Damp materials can smell stronger than dry ones.
Once dry, repeat the enzyme-cleaner treatment. Cover the area with baking soda and allow it to sit for several hours before vacuuming.
An odor that returns during warm or humid weather may mean urine remains deeper inside the mattress. Surface cleaning may not reach liquid that has entered thick foam or internal padding.
Avoid hiding the smell with perfume sprays. They may cover the odor for a short time without removing its source.
When a Mattress May Be Too Soaked to Clean
Cleaning is more difficult when:
- A large amount of urine entered the mattress
- The accident was not discovered for several days
- Urine reached deep foam or padding
- The mattress stayed wet for a long time
- A strong odor returns after repeated cleaning and full drying
- The mattress shows signs of moisture damage
A mattress may need to be replaced when it cannot be dried fully, has visible mold-like growth, or continues to smell strongly after careful treatment.
Do not keep sleeping on a mattress that is still damp. Check the mattress maker’s guidance before using professional cleaning equipment or arranging an outside cleaning service.
How to Protect the Mattress From Future Accidents
A waterproof mattress protector is the easiest way to reduce future cleanup. Look for one that fits the mattress depth and can be removed for washing.
For frequent accidents, a zippered waterproof encasement may protect more of the mattress. An encasement surrounds the whole mattress, while a fitted protector usually covers the top and sides.
You can also layer the bed for easier nighttime changes:
- Waterproof protector
- Fitted sheet
- Second waterproof protector
- Second fitted sheet
After an accident, remove the top sheet and protector. A clean layer is already underneath.
Make sure the extra layers do not make the bed too tight or cause the fitted sheet to slip. Always follow current care labels and product instructions.
Tips for Kids’ Beds, Guest Beds, and Pet-Friendly Homes
For a child’s bed, keep spare sheets and a clean protector nearby. A washable mattress pad may add another removable layer, but it should not replace a waterproof protector if liquid protection is needed.
For a guest bed, inspect the mattress before storing it under bedding. A mattress can feel dry on top while remaining damp below the surface.
For pet accidents, use a cleaner labeled for pet urine and suitable for mattress fabric. Keep the pet away until the mattress is fully dry and the cleaning product has been removed or dried as directed.
Frequently Asked Questions
Can urine permanently ruin a mattress?
A small accident does not always ruin a mattress. Quick blotting, proper cleaning, and complete drying can often save it. Deep soaking, repeated accidents, or moisture left inside the mattress may cause lasting stains or odors.
How long does a mattress take to dry after cleaning?
Drying may take several hours or longer. The time depends on how wet the mattress is, its materials, room humidity, and airflow. Thick foam usually takes longer to dry than a lightly damp surface.
Can I sleep on the mattress the same night?
Only sleep on it when it is fully dry. Check the top, sides, and underside for damp or cool areas. Use a different sleeping surface if the mattress is still wet at bedtime.
Will baking soda remove urine from a mattress?
Baking soda can absorb moisture and reduce some odor, but it does not fully break down urine residue. Use it after blotting and treating the area with a suitable urine or enzyme cleaner.
Can I use a carpet cleaner on a mattress?
Do not use a carpet-cleaning machine unless the mattress manufacturer says it is safe. These machines may add too much water, and strong suction or heat may damage some mattress materials.
Should I use hot or cold water on a urine stain?
Use cool water when a cleaner’s instructions call for water. Hot water may make some stains and odors harder to remove. Avoid adding more water than necessary.
What should I do if the urine smell keeps returning?
Let the mattress dry completely, then repeat the enzyme treatment. A smell that keeps returning may mean urine soaked into the inner layers. Replacement or professional advice may be needed if repeated careful cleaning does not solve the problem.
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