Mattress Guides

How to Remove New Mattress Smell Overnight

Buying a new mattress should feel exciting, not overwhelming. Yet for many people, the first night turns uncomfortable because of a strong new mattress smell often described as chemical, plasticky, or “factory-like.” If you’re wondering how to remove new mattress smell overnight, you’re not alone.

The good news? You don’t need to wait days or weeks for the odor to fade naturally. With the right techniques, you can significantly reduce, or even eliminate, the smell in just one night using safe, simple methods.  This guide explains what causes the odor, whether it’s harmful, and exactly how to eliminate it fast using proven, non-toxic solutions.

Key Takeaways

• New mattress smell is caused by off-gassing, where foams and materials release VOCs after unboxing.
• Memory foam mattresses usually smell stronger because they trap more gases during manufacturing.
• For most people, the odor is temporary, but sensitive individuals may experience headaches or irritation.
• Ventilation, baking soda, airflow, and charcoal can reduce or remove mattress smells overnight.
• Avoid harsh chemicals or wet cleaning, as they can damage the mattress and worsen odors.

What Causes the New Mattress Smell?

The noticeable odor that comes from a newly unpacked mattress is caused by a process known as off-gassing. This occurs as materials in the mattress release trapped chemical compounds into your bedroom air.

Off-gassing refers specifically to the release of volatile organic compounds (VOCs) from manufactured products. These small molecules easily evaporate at room temperature, creating that characteristic “new mattress” odor. Common VOCs found in mattresses include formaldehyde, benzene, toluene, and chlorofluorocarbons (CFCs). 

These compounds come from various components:

• Petroleum-based foams used in construction
• Adhesives and glues that bind layers together
• Flame retardants added for safety compliance
• Synthetic dyes and fabric treatments

The intensity of off-gassing peaks during the first 24 to 72 hours after unwrapping, particularly with mattresses that have been compressed and sealed in plastic. Nevertheless, low-level emissions may continue for weeks or even months.

Why memory foam smells stronger

Memory foam mattresses typically produce more noticeable odors compared to other types. This occurs primarily because they contain polyurethane, a petroleum-based plastic manufactured using chemical blowing agents and stabilizers. 

Additionally, memory foam contains chemicals like isocyanates that react with moisture in the air, creating particularly strong scents. The dense nature of memory foam also traps more gasses during manufacturing, releasing them gradually once the mattress is unboxed.

Is the Smell Harmful or Just Annoying?

Many wonder if that chemical scent coming from their new bed represents a health risk or merely an annoyance. The answer lies somewhere in between. For most adults, the smell is temporary and mildly irritating, but for certain individuals, it can cause noticeable discomfort.

Health effects of VOCs

New mattress odors are caused by volatile organic compounds (VOCs) released during off-gassing. In most cases, exposure levels are low and do not pose serious health risks. However, short-term symptoms can occur, including:

• Headaches
• Dizziness or lightheadedness
• Nausea
• Eye, nose, or throat irritation

Some VOCs, such as formaldehyde are classified as carcinogens with potential links to liver damage, kidney strain, nervous system effects, and hormonal disruption after long-term or repeated exposure. While mattress emissions typically fall within safety limits, reducing exposure is still a wise precaution.

Who Is Most Sensitive to Mattress Smells?

Certain groups are more vulnerable to the effects of off-gassing:

• Infants and young children, who breathe more air relative to body weight
• People with asthma or allergies, who may experience respiratory irritation
• Individuals with chemical sensitivities or migraines
• Pregnant women, due to increased sensitivity to airborne chemicals

These individuals may notice stronger reactions even when others do not.

When to be concerned

Though initial off-gassing poses minimal risk for most adults, consider these factors:

• Symptoms that persist after ventilation
• Strong odors lasting beyond one week
• Difficulty breathing or severe headaches

Remember that chemical exposure is cumulative, mattresses contribute to your overall indoor air pollution alongside other household items. Consequently, taking steps toward removing the new mattress smell becomes prudent rather than merely cosmetic.

8 Natural Ways to Remove New Mattress Smell Overnight

Tackling a strong new mattress odor requires proactive measures. Fortunately, several natural solutions can dramatically reduce off-gassing without harsh chemicals.

1. Air it out in a ventilated room

The simplest solution involves removing all packaging and placing the mattress in a well-ventilated area. Open windows and doors to increase circulation, allowing VOCs to dissipate more quickly. This method typically takes three to seven days for complete off-gassing, but creates noticeable improvement overnight.

2. Use baking soda to absorb odors

Baking soda effectively neutralizes acidic odors. Sprinkle a generous amount across the entire mattress surface and leave it for at least 24 hours. Afterward, thoroughly vacuum to remove the powder along with absorbed compounds.

3. Place activated charcoal bags nearby

Activated charcoal excels at absorbing odors and moisture. Place charcoal packs near or directly on the mattress for 24-48 hours. The porous structure captures VOCs effectively, making this method particularly useful for stronger smells.

4. Try essential oils for masking

Mix 10-15 drops of lavender, tea tree, or eucalyptus oil with water in a spray bottle. Lightly mist the mattress, focusing on problem areas. These oils not only mask odors but often provide antimicrobial benefits.

5. Use a breathable mattress protector

A high-quality, breathable protector creates a barrier between you and remaining odors. Look for organic options certified to non-toxic standards that block VOCs while still allowing airflow.

6. Use a fan or air purifier

Improve circulation with fans pointed directly at the mattress to expedite off-gassing. Air purifiers with HEPA filters actively remove airborne chemicals and odors, providing comprehensive air cleaning.

7. Avoid direct sunlight exposure

Despite common recommendations, direct sunlight can damage synthetic materials and memory foam, causing them to degrade and become crumbly. Instead, opt for indirect light in well-ventilated spaces.

8. Flip or rotate the mattress

Regular rotation gives materials an opportunity to release trapped gasses from all sides. For non-pillowtop designs, rotating every six months promotes even wear. Memory foam mattresses shouldn’t be flipped but benefit from rotation.

Read Also: How Often Should You Flip Your Mattress?

Can You Sleep on a New Mattress the First Night?

Yes, but only after taking steps to reduce the smell.

If you must sleep on It tonight:

• Ventilate aggressively
• Use baking soda for at least 4 hours
• Use breathable cotton sheets
• Keep windows cracked open overnight

If the smell causes headaches or nausea, it’s better to sleep elsewhere for one night.

What NOT to Use to Remove Mattress Smell

Some popular “hacks” actually damage mattresses.

Avoid These:

• Vinegar sprays (can degrade foam)
• Strong chemical deodorizers
• Fabric sprays with heavy fragrance
• Steam cleaning (traps moisture inside foam)
• Excessive water or wet cleaning

These may mask the smell temporarily but worsen it long-term.

How to Prevent New Mattress Smell in the Future

If you’re buying another mattress soon, keep these tips in mind:

• Choose low-VOC certified mattresses
• Avoid ultra-cheap foam mattresses
• Ask how long the mattress was stored compressed
• Air it out before placing it in the bedroom
• Buy from brands with transparent material disclosures

Higher-quality materials off-gas faster and less intensely.

Read Also: How to Store a Mattress: Expert Tips to Prevent Costly Damage

FAQs about Remove New Mattress Smell

How long does new mattress smell last? 

Most mattress odors fade within 24-72 hours, though some may linger for 3-7 days depending on the material and ventilation. Memory foam mattresses typically need more time to completely off-gas than hybrid designs.

Read Also: Are Memory Foam Mattresses Safe

Is it safe to sleep on a mattress while it’s still off-gassing? 

Although generally considered non-toxic, those sensitive to odors should air out their mattress for at least 24 hours initially. People with asthma or respiratory conditions might need to wait longer.

What causes certain mattresses to smell stronger? 

Memory foam mattresses contain polyurethane, which releases more VOCs due to their density and manufacturing process. Natural latex typically emits milder, earthy scents that dissipate faster.

Should I worry if the smell persists beyond a week? 

Persistent strong odors after 1-2 weeks might indicate higher VOC levels. Consider returning the mattress if proper ventilation doesn’t resolve the issue.

Does memory foam smell worse than spring mattresses?

Yes. Memory foam and hybrid mattresses off-gas more than traditional innerspring mattresses.

Read Also: Hybrid vs Innerspring Mattress: Which Is Right for You?

Can a new mattress smell cause headaches?

Yes, especially for sensitive individuals. Ventilation and air purifiers help reduce symptoms quickly.

Will the smell ever completely go away?

Yes. Even strong smells disappear entirely once off-gassing finishes, usually within a few days to weeks.

What certifications indicate lower VOC emissions? 

Look for CertiPUR-US certified foams, indicating materials made without formaldehyde, heavy metals, and prohibited phthalates, with VOC emissions less than 0.5 parts per million.

Conclusion: You Can Remove New Mattress Smell Overnight

A new mattress smell is annoying, but it’s temporary and manageable. With ventilation, baking soda, airflow, and a little patience, you can make your mattress sleep-ready overnight without harsh chemicals. The key is letting the mattress breathe, not covering or masking the problem.