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Home / Mattress Resources / Why Does My Mattress Smell? 
Mattress Resources

Why Does My Mattress Smell? 

by Sarah Anderson: Certified Sleep Coach and Mattress Tester CERTIFIED SLEEP COACH Comment on Why Does My Mattress Smell? 
Updated October 28, 2025

Our proficient team of sleep science coaches, engineers, and product evaluators rigorously inspect hundreds of mattresses using our unique product methodology. Each article is scrutinized for precision, citing only credible sources. Systematically reviewing our content and recommendations, we align with the latest scientific literature and expert insights. Our top-rated mattresses have been personally evaluated and highly rated.

Key Takeaways

  • New Mattress Odors: Off-gassing from VOCs in memory foam and synthetic materials causes initial smells, fading within 2-7 days.
  • Odor Sources: Sweat, body oils, dust mites, and trapped moisture contribute to long-term mattress odors without proper maintenance.
  • Prevention Tips: Daily habits like airing out your mattress, using protectors, and washing bedding regularly prevent odors.
  • Cleaning Solutions: Use baking soda, essential oils, and proper ventilation for deodorizing, and address spills or accidents immediately to avoid lingering smells.

Your new mattress might smell normal, but this scent signals VOCs releasing into the air. These compounds can make your airways sore and cause discomfort. The smell usually fades in 2 to 7 days, but it’s just one-way mattresses start to smell bad.

Mattresses battle smells throughout their lives. Dust mites eat dead skin cells, while mold grows from trapped moisture. These sleep surfaces can trap many compounds that smell unpleasant. Your daily use lets sweat and body oils sink in, creating lasting odors when you don’t clean them.

This article explores why my mattress smells and offers practical ways to keep your sleeping space fresh. It offers strategies for handling your mattress’s original off-gassing and long-term care. These tips will help keep your bed clean and smelling fresh.

Understanding Your Mattress Type and Odor Risks

Different mattress materials create varying levels of odor risks based on their makeup and how they’re manufactured. Memory foam mattresses made from viscoelastic polyurethane foam give off more noticeable off-gassing odors than traditional mattresses.

Memory foam vs. traditional mattresses

Memory foam mattresses have polyurethane-based materials that release volatile organic compounds (VOCs) right after unpacking. These beds are great at relieving pressure and isolating motion. Their synthetic makeup creates more obvious odors at first. Traditional innerspring mattresses give off much less off-gassing because they use metal coils and have less foam.

Natural vs. synthetic materials

Natural latex mattresses processed through Dunlop or Talalay methods give off very little odor because of their organic makeup. These mattresses usually come with GREENGUARD Gold or OEKO-TEX certifications, which provide a lower emission standard. Synthetic materials like memory foam and polyfoam have more chemical compounds that contribute to off-gassing.

Chemical exposure concerns make these certifications vital:

  • CertiPUR-US certified foams must emit less than 0.5 parts per million of VOCs
  • GOLS certification ensures organic latex processing standards
  • OEKO-TEX certification guarantees testing for harmful substances

Age-related odor development

A mattress’s age greatly affects odor development. High-density memory foam and natural latex keep their structure longer, so they have fewer age-related odor problems. The original build quality guides how long a mattress lasts. Entry-level mattresses wear out faster than high-end hybrid models.

Old mattresses face several factors that create odors. Poor airflow lets moisture build-up, and dust mites that feed on dead skin cells can create bad smells. Dense foams might trap more moisture and body oils as time passes, which creates gradual odor buildup.

Daily Habits That Prevent Mattress Odors

A fresh-smelling mattress needs daily care and good habits. Simple prevention can keep odors away and make your mattress last longer.

Morning mattress care routine

You shouldn’t make your bed right after waking up. Pull back the covers and let your mattress breathe for at least 30 minutes. This helps dry out night-time moisture that could make bacteria grow. Opening windows during this time creates better airflow and gets rid of trapped moisture and musty smells.

Proper bedding maintenance

Regular bedding care is the lifeblood of mattress freshness. Here’s how often you should wash your bedding:

  • Sheets and pillowcases: Weekly washing at 60 degrees
  • Duvet covers: Every 2-3 weeks
  • Mattress protector: Monthly cleaning
  • Duvet and pillows: Every 6 months

A quality mattress protector is your first defense against moisture, stains, and smelly bacteria. These protectors stop sweat and body oils from getting into your mattress while being easy to wash.

Ventilation practices

Good ventilation requires steady airflow around your mattress. Opening bedroom windows often, especially during sheet changes, removes lingering odors. Sunlight helps, too—UV rays naturally clean and deodorize your mattress surface.

Keep the space under your mattress free from clutter. This lets air flow better and cuts down moisture that could cause mold. Good ventilation needs daily attention and seasonal care. Remember to rotate your mattress so different areas get fresh air.

Ceiling fans or portable fans can boost air movement. This becomes vital in humid places where controlling moisture is significant. Steady airflow keeps your sleeping space dry, stops smelly bacteria, and keeps your mattress fresh longer.

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Essential Tools for Mattress Freshness

You need specific tools and supplies to keep your mattress fresh. These items work together to create a clean, odor-free sleeping environment. A good set of mattress care items will give a lasting, fresh, and hygienic space.

Protective covers and mattress toppers

High-quality mattress protectors are your first line of defense against odors and stains. The best protectors combine moisture protection with antimicrobial properties. They block liquids and fight odor-causing bacteria effectively. Waterproof mattress protectors with antimicrobial treatments stay effective for up to 30 home launderings.

Skip the simple covers and choose protectors with DOW Silvadur antimicrobial protection for better odor control. These advanced protectors keep working through multiple washes. They continue to protect your mattress from moisture and unwanted smells.

Read Also: Mattress Pad vs Mattress Protector

Natural deodorizers and fresheners

Baking soda is a powerful natural deodorizer for mattresses. This versatile compound removes stains and neutralizes odors. Sprinkle baking soda over your entire mattress surface and let it sit for at least an hour to get the best results.

Natural essential oils can make the deodorizing process better:

  • Lavender: Promotes relaxation
  • Chamomile: Helps you sleep
  • Jasmine: Creates a calming atmosphere
  • Peppermint: Provides fresh scent
  • Lemon: Offers purifying properties

Mix equal parts water and white vinegar to create an effective organic deodorizer. This solution neutralizes odors without using harsh chemicals in your sleeping environment.

Cleaning supplies and equipment

Your cleaning kit should include specific tools to maintain mattress freshness. Here are the essential items you’ll need:

  • Basic Supplies: A spray bottle to apply cleaning solutions, rubber gloves for protection, and soft-bristled brushes for gentle cleaning. These tools help you apply cleaning solutions without getting your mattress too wet.
  • Cleaning Solutions: Mix dish soap, baking soda, and hydrogen peroxide for an effective stain remover. If you prefer natural options, salt and lemon juice make another great cleaning alternative.
  • Vacuum Equipment: Use a vacuum with specialized upholstery attachments for mattress cleaning. These attachments remove debris from mattress crevices and surface areas to keep everything clean.

Seasonal Mattress Maintenance Guide

Your mattress faces different challenges in each season. You need specific care routines to keep it fresh and odor-free. A good seasonal care plan will help your mattress last longer and stay clean all year round.

Spring cleaning protocols

Spring is a great time to refresh your mattress. Start by vacuuming the surface with an upholstery tool to remove winter debris. Mix mild soap with water to clean visible marks, but don’t get the surface too wet.

Good airflow plays a vital role in spring cleaning. Stand your mattress near an open window to let fresh air remove the winter staleness. Finish the cleaning by sprinkling baking soda on the surface. Let it sit for 15-30 minutes and vacuum it up to remove any lingering smells.

Summer moisture control

Summer heat and humidity create perfect conditions for smelly bacteria. Here are great ways to curb these issues:

  • Choose lightweight cotton or linen sheets for better airflow
  • Get a breathable, water-resistant mattress cover
  • Keep your AC running to avoid heat buildup
  • Place fans strategically to improve air circulation
  • Let direct sunlight hit your mattress now and then for natural cleaning

High humidity makes dehumidifiers a great tool to prevent moisture buildup. Keep an eye on humidity levels during warm months to stop mold and mildew from growing.

Winter care considerations

Winter care focuses on managing moisture and warmth. Look for signs of sagging or dents that might trap moisture. Check the seams and edges to make sure they’re in good shape.

A mattress topper is a good addition for winter. It adds warmth and protects against spills and marks. Brushed cotton sheets will keep you warm without sacrificing breathability.

Use a humidifier during cold months to prevent your mattress from getting too dry. Give your mattress one last rotation before spring to help it wear evenly. Regular checks are really important after traveling – look carefully for any unwanted visitors that might cause odors.

Emergency Odor Management Solutions

Accidents never come with a warning. You must act fast to save your mattress from permanent damage and bad smells. The right emergency response techniques will provide a healthy sleeping environment and protect the quality of your mattress.

Dealing with spills and accidents

Quick action is vital when liquid spills happen. Start by removing all bedding and pressing firmly with paper towels or clean cloths to soak up moisture—don’t rub. A simple mix of equal parts distilled white vinegar and water works great on water-based spills and gets rid of stains and smells.

Here’s a powerful cleaning solution for tough stains:

  • 16 ounces of 3% hydrogen peroxide
  • 4 tablespoons of baking soda
  • 2-4 drops of liquid detergent

Spray the mixture on the stain and let it sit for 30 minutes before you blot it with a clean towel. Don’t soak the mattress too much – extra moisture can lead to mold.

Addressing pet-related odors

Pet accidents need extra care because animal urine contains concentrated elements, such as ammonia. Enzyme-based cleaners are a great way to eliminate these protein-based stains by breaking them down.

Steps to curb stubborn pet odors:

  1. Apply baking soda directly to the soiled area
  2. Allow it to darken as it absorbs moisture
  3. Hoover up and repeat until fresh baking soda remains white

Mix this natural pet deterrent:

  • 1.5 cups cold water
  • 2 tablespoons white vinegar
  • 20 drops citrus essential oil

This mix keeps pets away from marked spots and leaves a fresh scent.

Quick fixes for unexpected situations

A mix of cornstarch and baking soda works great at absorbing body oils and neutralizing bad smells right away. Let this mixture sit on your mattress for 24 hours before vacuuming it.

A handheld vacuum with an upholstery brush is perfect for removing surface debris and pet dander. Regular cleaning of all mattress crevices and sides will stop odor-causing particles from building up.

Sunlight is nature’s deodorizer. Your mattress will smell fresh after a few hours in direct sunlight as UV rays naturally clean and freshen the surface. Good airflow helps during and after you clean.

Keep these emergency cleaning supplies ready:

  • Enzyme cleaners for biological stains
  • White vinegar and spray bottles
  • Baking soda for odor absorption
  • Clean microfiber towels
  • Rubber gloves for protection

Sometimes, you’ll need professional help, especially with deep stains or smells that won’t go away. These services use commercial-grade equipment and special solutions that aren’t available in stores.

Read Also: Bad Mattress Symptoms You Can’t Ignore

FAQs about Why Does My Mattress Smell?

How do you remove odors from a mattress?

To eliminate odors from a mattress, sprinkle baking soda evenly across its surface and let it sit for several hours. Afterward, thoroughly vacuum the mattress to remove the baking soda. You can also air out the mattress in a well-ventilated space or use a mattress-specific fabric freshener to neutralize odors effectively.

Read Also: How to Get the Smell out of a Mattress?

Is it normal for a mattress to have an odor?

Yes, it’s common for new mattresses to have a slight odor at first, often referred to as “off-gassing.” This smell comes from the materials and packaging and typically fades within a few days to a few weeks as the mattress airs out. If the smell persists or is unusually strong, contact the manufacturer for assistance.

What can I spray on my mattress?

A simple spray made from water and essential oils like lavender or tea tree is effective for freshening your mattress. Mix a few drops of your preferred essential oil with water in a spray bottle and lightly mist the mattress surface. The oils help neutralize odors while leaving a pleasant scent. This same mixture can also be used as a soothing pillow spray for a better sleep experience.

What Goes Under a Mattress?

Under a mattress, you typically need a sturdy foundation like a box spring, platform bed, or slatted frame to provide support and prevent sagging. Some adjustable beds also serve as a base. Always check your mattress type for compatibility with the foundation.

Why does my bed smell musty?

A musty odor in your bed could result from moisture buildup, mold, or dust mites. To address this, ensure your mattress gets adequate ventilation by opening windows or using a fan. Using a dehumidifier can also help control moisture levels, reducing the chances of musty smells while maintaining an ideal humidity level for restful sleep.

How can I deodorize my mattress without a vacuum?

If a vacuum isn’t available, you can still deodorize your mattress effectively. Sprinkle baking soda over the surface and let it sit for a few hours or overnight to absorb odors. Afterward, gently scrub the surface with a clean cloth or soft brush to remove the baking soda and any trapped smells. For an added touch, lightly mist the mattress with a scented spray to freshen it further.

Conclusion

Bad smells from your mattress show why it happens and when you need to take action. New mattress smells usually go away within a week. Your mattress will stay fresh longer with regular care and proper cleaning. Daily habits, good tools, and seasonal maintenance create the quickest way to fight mattress odors. Natural deodorizers like baking soda work well. Quality protective covers and good airflow will greatly extend your mattress’s life and keep it fresh.

Different mattress materials need specific care methods. Memory foam needs a different treatment than traditional innerspring mattresses. Good airflow and moisture control help all types. You should clean spills and accidents right away. Regular maintenance stops most smell problems before they start. The right tools, ventilation, and cleaning routines will give you a fresh, healthy place to sleep. These simple steps protect your investment and help you sleep better for years.

About the author
Sarah Anderson: Certified Sleep Coach and Mattress Tester
Sarah Anderson: Certified Sleep Coach and Mattress Tester
CERTIFIED SLEEP COACH

With nearly five years of experience as a certified sleep coach and mattress tester, Sarah Anderson is renowned for her detailed and nuanced content on mattress reviews and sleep health. Sarah’s expertise is backed by her degree in journalism from Arizona State University, which she earned in 2016.

She has contributed to over a dozen respected publications, including 9NEWs, the Arizona Republic, and the Fresno Bee. Her articles are known for their thorough research and insightful analysis, making her a trusted voice in the sleep industry.

Find more articles by Sarah

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