That unmistakable, unpleasant odor – the dreaded freezer burn smell – clinging to your plastic containers is a common kitchen woe. It permeates the plastic, lingering long after the offending food has been discarded. Getting rid of this smell isn’t just about being aesthetically pleased; it’s crucial for ensuring the safety and quality of food stored in those containers in the future. This comprehensive guide provides proven methods, helpful tips, and essential insights to successfully eliminate the freezer burn smell from your plastic food storage containers.
Understanding the Freezer Burn Smell
The source of the smell is multifaceted, primarily stemming from the sublimation process that defines freezer burn. When frozen food is improperly stored, water molecules escape the food’s surface, turning directly into vapor in the dry freezer environment. This dehydration damages the food’s surface, altering its texture and flavor. However, the smell we associate with freezer burn comes from volatile organic compounds (VOCs) released from the food as it deteriorates under these conditions.
These VOCs, often containing rancid fats and other breakdown products, get absorbed into the porous surface of the plastic. Cheaper plastics are more susceptible, but even high-quality containers can absorb these odors over time. The colder temperatures of the freezer actually slow down the dissipation of these odors, effectively trapping them within the plastic matrix.
Why Plastic is So Susceptible to Odors
Plastic, particularly the types commonly used for food storage, is not entirely impermeable. Microscopic pores and its chemical structure allow it to absorb various compounds, including those responsible for the freezer burn smell. The intensity of the odor depends on several factors: the type of food stored, the duration of storage, the quality of the plastic, and the effectiveness of the container’s seal. Over time, the accumulated odors can become deeply embedded, making them more difficult to remove.
Effective Methods for Eliminating the Freezer Burn Smell
Fortunately, several readily available household items and techniques can effectively combat and neutralize the freezer burn smell in your plastic containers. The key is persistence and, in some cases, repeating the cleaning process until the odor is completely gone.
The Power of Baking Soda
Baking soda, also known as sodium bicarbonate, is a versatile and natural deodorizer. Its mild alkalinity helps to neutralize acidic odor molecules, making it an effective tool for removing the freezer burn smell.
To use baking soda effectively:
- Create a Paste: Mix baking soda with a small amount of water to form a thick paste.
- Apply and Scrub: Apply the paste generously to the inside of the container, focusing on areas where the odor is strongest. Gently scrub the surface with a sponge or cloth.
- Let it Sit: Allow the baking soda paste to sit in the container for several hours or even overnight. This gives it time to absorb the odors.
- Rinse Thoroughly: Rinse the container thoroughly with warm water and dish soap to remove all traces of the baking soda paste.
- Air Dry: Allow the container to air dry completely. Sunlight can help to further neutralize any lingering odors.
For stubborn odors, you can also try filling the container with a baking soda solution (1-2 tablespoons of baking soda per cup of water) and letting it soak overnight.
The Versatility of Vinegar
Vinegar, particularly white vinegar, is another excellent natural deodorizer and cleaning agent. Its acidity helps to break down grease and grime, while its strong odor neutralizes other unpleasant smells.
To use vinegar effectively:
- Vinegar Soak: Fill the container with equal parts white vinegar and water.
- Soak and Scrub: Let the solution soak for at least 30 minutes, or preferably overnight. After soaking, scrub the container thoroughly with a sponge or cloth.
- Rinse and Dry: Rinse the container thoroughly with warm water and dish soap. Allow it to air dry completely.
If the smell persists, try boiling a solution of vinegar and water (1:1 ratio) in a pot, and then carefully placing the container over the steaming pot (ensure the container is heat-safe). The steam will penetrate the plastic and help to loosen the odor molecules.
Harnessing the Deodorizing Power of Coffee Grounds
Coffee grounds, both fresh and used, possess excellent odor-absorbing properties due to their porous structure and aromatic compounds. They can effectively neutralize a variety of smells, including the freezer burn odor.
To use coffee grounds effectively:
- Fill the Container: Fill the container with dry, unused coffee grounds. Alternatively, you can use leftover coffee grounds that have been dried out.
- Seal and Wait: Seal the container tightly and let it sit for several days, or even a week. The coffee grounds will absorb the odors over time.
- Dispose and Clean: Dispose of the coffee grounds and wash the container thoroughly with warm water and dish soap.
- Air Dry: Allow the container to air dry completely.
The strong scent of coffee grounds will initially mask the freezer burn smell, but over time, it will actually absorb and neutralize the odor molecules.
The Sunshine Solution
Sunlight is a natural disinfectant and deodorizer. The ultraviolet (UV) rays in sunlight can kill bacteria and break down odor molecules.
To use sunlight effectively:
- Wash the Container: Thoroughly wash the container with soap and water.
- Place in Sunlight: Place the container in direct sunlight for several hours, or even a full day.
- Inspect and Repeat: Check for any remaining odor. If the smell persists, repeat the process.
This method is particularly effective for mild odors and can also help to remove stains from plastic containers. Note that prolonged exposure to sunlight can cause some plastics to fade or become brittle, so monitor the container carefully.
Activated Charcoal: An Excellent Adsorbent
Activated charcoal is a highly porous form of carbon that is excellent at adsorbing odors and impurities. It’s often used in water filters and air purifiers.
To use activated charcoal effectively:
- Place Charcoal in Container: Place a few pieces of activated charcoal briquettes (make sure they are designed for food use) inside the container. Alternatively, you can use activated charcoal powder in a small, breathable cloth bag.
- Seal and Wait: Seal the container tightly and let it sit for several days or a week.
- Dispose and Clean: Dispose of the activated charcoal and wash the container thoroughly with warm water and dish soap.
- Air Dry: Allow the container to air dry completely.
Activated charcoal works by trapping odor molecules within its pores, effectively removing them from the container.
Lemon Juice: A Natural Deodorizer and Disinfectant
Lemon juice contains citric acid, which is a natural deodorizer and disinfectant. It can also help to cut through grease and grime.
To use lemon juice effectively:
- Lemon Juice Soak: Fill the container with lemon juice (either fresh or bottled).
- Soak and Scrub: Let the solution soak for at least 30 minutes. After soaking, scrub the container thoroughly with a sponge or cloth.
- Rinse and Dry: Rinse the container thoroughly with warm water and dish soap. Allow it to air dry completely.
For a stronger effect, you can also try rubbing the cut side of a lemon directly onto the inside of the container.
Dish Soap and Hot Water: A Basic Approach
Sometimes, a simple solution is all you need. Thoroughly washing the container with hot, soapy water can often remove mild freezer burn smells.
To use dish soap and hot water effectively:
- Soak in Hot Water: Fill the container with hot water and add a generous amount of dish soap.
- Scrub Thoroughly: Scrub the container thoroughly with a sponge or cloth, paying attention to all surfaces.
- Rinse Well: Rinse the container thoroughly with hot water to remove all traces of soap.
- Air Dry: Allow the container to air dry completely.
This method is most effective when the odor is relatively new and has not deeply permeated the plastic.
Oatmeal: A Gentle Absorber
Similar to baking soda and coffee grounds, oatmeal can absorb unwanted odors due to its large surface area and porous texture.
To use oatmeal effectively:
- Fill the Container: Fill the container with dry, uncooked oatmeal.
- Seal and Wait: Seal the container tightly and let it sit for several days or a week.
- Dispose and Clean: Dispose of the oatmeal and wash the container thoroughly with warm water and dish soap.
- Air Dry: Allow the container to air dry completely.
Oatmeal is a gentle option, making it suitable for more delicate plastic containers.
Preventative Measures: Stop the Smell Before It Starts
While these methods are effective at removing the freezer burn smell, the best approach is to prevent it from occurring in the first place. Proper food storage practices can significantly reduce the likelihood of odors building up in your plastic containers.
Proper Food Wrapping and Sealing
The single most important factor in preventing freezer burn is proper wrapping and sealing of food.
- Use Freezer-Safe Bags and Containers: Always use bags and containers specifically designed for freezer storage. These materials are thicker and more resistant to moisture loss.
- Remove Excess Air: Press out as much air as possible from freezer bags before sealing them. Consider using a vacuum sealer for optimal air removal.
- Double Wrapping: For foods that are particularly susceptible to freezer burn, consider double-wrapping them in plastic wrap and then placing them in a freezer bag or container.
- Ensure Airtight Seals: Make sure that your plastic containers have airtight seals. Replace lids that are cracked or damaged.
Optimal Freezer Temperature and Organization
Maintaining a consistent and optimal freezer temperature is crucial for preventing freezer burn.
- Keep Freezer at 0°F (-18°C): Ensure that your freezer is set to 0°F (-18°C) or lower. This temperature will effectively slow down the sublimation process.
- Regular Defrosting: Regularly defrost your freezer to remove ice buildup, which can interfere with proper sealing and temperature regulation.
- Proper Organization: Organize your freezer in a way that allows for good air circulation. Avoid overpacking, which can prevent proper freezing and contribute to freezer burn.
Regular Cleaning of Your Containers
Regularly cleaning your plastic containers is essential for preventing the buildup of odors and stains.
- Wash After Each Use: Wash your containers thoroughly with hot, soapy water after each use.
- Avoid Abrasive Cleaners: Avoid using abrasive cleaners, as they can scratch the plastic and make it more susceptible to absorbing odors.
- Deep Clean Periodically: Periodically deep clean your containers using one of the methods described above, even if they don’t have a noticeable odor.
By implementing these preventative measures, you can significantly reduce the likelihood of freezer burn and keep your plastic containers fresh and odor-free.
Choosing the Right Type of Plastic Container
The type of plastic used in your food storage containers can also influence how easily they absorb odors. Some plastics are more porous than others.
- Opt for High-Quality Plastics: Choose containers made from high-quality, durable plastics. These materials are generally less porous and more resistant to absorbing odors.
- Consider Glass Alternatives: Glass containers are non-porous and do not absorb odors. They are an excellent alternative to plastic for storing foods that are prone to causing strong smells.
- Be Aware of Recycling Codes: Different plastic recycling codes indicate different types of plastic. Some types are more prone to absorbing odors than others. Research the different codes and choose containers made from more resistant materials.
By being mindful of the type of plastic you choose, you can further minimize the risk of freezer burn smells and keep your food storage containers fresh and clean.
Troubleshooting Stubborn Odors
Sometimes, despite your best efforts, the freezer burn smell may persist. In these cases, you may need to try a combination of methods or repeat the cleaning process multiple times.
- Combine Methods: Try combining different cleaning methods. For example, you could soak the container in vinegar followed by a baking soda paste treatment.
- Repeat the Process: Don’t give up after just one attempt. Sometimes it takes several rounds of cleaning to completely remove stubborn odors.
- Consider Replacing the Container: If the odor is extremely persistent, and you’ve tried everything else, it may be time to replace the container. It’s better to err on the side of caution when it comes to food safety.
Dealing with stubborn odors can be frustrating, but with persistence and the right techniques, you can usually find a solution.
What causes the “freezer burn smell” in plastic containers?
The unpleasant “freezer burn smell” that permeates plastic containers is primarily caused by two factors: the absorption of odors from stored food and the plastic itself degrading over time, especially with repeated freezing and thawing. Porous plastics can absorb volatile organic compounds (VOCs) released by foods like meat, onions, or garlic. These VOCs become trapped within the plastic, creating a lingering smell that is difficult to remove.
Furthermore, the low temperatures and temperature fluctuations in the freezer can cause plastic polymers to break down gradually. This degradation releases its own distinct odor, which, combined with absorbed food smells, creates the characteristic “freezer burn smell.” The quality of the plastic also plays a role; cheaper plastics are more prone to absorbing odors and breaking down than higher-quality, freezer-safe materials.
Can I completely eliminate the freezer burn smell from all plastic containers?
While you can significantly reduce or eliminate freezer burn smells, complete removal isn’t always guaranteed, especially in heavily affected containers or those made from lower-quality plastic. The success of odor removal depends on the severity of the permeation, the type of plastic, and the cleaning methods employed. Persistent odors might require repeated treatments or, in extreme cases, replacement of the container.
Therefore, focus on prevention is key. Using high-quality, freezer-safe containers, properly sealing food to minimize exposure, and rotating your freezer stock to prevent long-term storage will all help reduce the likelihood of freezer burn and associated smells. If the odor persists after several cleaning attempts, it may be time to consider replacing the container.
What are some effective home remedies to get rid of the smell?
Several effective home remedies can help eliminate the freezer burn smell from plastic containers. One popular method involves soaking the container in a solution of warm water and baking soda. Baking soda is a natural deodorizer that absorbs odors, leaving the container smelling fresher. Another approach is to fill the container with crumpled newspaper and seal it for a few days, as newspaper also absorbs odors effectively.
Alternatively, you can try washing the container with a mixture of white vinegar and water. Vinegar is a mild acid that can neutralize many odor-causing compounds. For stubborn smells, leaving the container in direct sunlight for a few hours can also help, as ultraviolet light can break down some odor molecules. Remember to thoroughly wash and rinse the container after using any of these remedies.
How does sunlight help remove the freezer burn smell?
Sunlight, specifically the ultraviolet (UV) rays it contains, plays a crucial role in breaking down the molecules responsible for the freezer burn smell in plastic containers. UV light acts as a catalyst, accelerating the decomposition of odor-causing compounds that have been absorbed into the plastic. This process effectively neutralizes the source of the smell.
Furthermore, the heat from the sun can also help to volatilize any remaining odor molecules, allowing them to dissipate into the air. It’s important to remember to thoroughly wash and rinse the container before and after sun exposure to remove any residue or loose debris. While effective, prolonged exposure to sunlight can also degrade the plastic over time, so monitor the container carefully.
Are there specific cleaning products I should avoid when cleaning plastic containers with freezer burn smell?
When cleaning plastic containers with freezer burn smell, it’s generally best to avoid using harsh chemicals or abrasive cleaners. These can damage the plastic surface, potentially worsening the odor problem by creating microscopic scratches that trap more odor molecules. Avoid using bleach, ammonia-based cleaners, or scouring pads, as they can be too aggressive and leave behind their own chemical residues.
Instead, opt for gentle, natural cleaning solutions like baking soda, vinegar, or lemon juice. Dish soap is also a good option, but ensure it is thoroughly rinsed away. If you’re using a commercial cleaning product, choose one specifically designed for plastic and always test it in an inconspicuous area first to ensure it doesn’t cause discoloration or damage.
How can I prevent freezer burn and the associated smell in the first place?
Preventing freezer burn is the most effective way to avoid the unpleasant freezer burn smell in plastic containers. Proper food storage techniques are crucial. Ensure food is completely cooled before placing it in the container, and use airtight containers or freezer bags to minimize air exposure, the primary cause of freezer burn. Consider vacuum sealing food for even better protection.
Furthermore, regularly rotate your freezer stock, using older items first. This prevents food from sitting in the freezer for extended periods, reducing the risk of freezer burn developing. Label and date all containers to keep track of storage times. Lastly, avoid overfilling your freezer, as proper air circulation is necessary to maintain consistent temperatures and prevent freezer burn.
What types of plastic containers are less prone to absorbing the freezer burn smell?
Certain types of plastic are less prone to absorbing odors and developing the freezer burn smell. Look for containers specifically labeled as “freezer-safe” and made from high-density polyethylene (HDPE) or polypropylene (PP). These plastics are less porous and more resistant to absorbing volatile organic compounds (VOCs) from food.
Conversely, avoid using containers made from low-density polyethylene (LDPE) or polystyrene (PS) for long-term freezer storage, as these materials are more prone to absorbing odors. Glass containers are also a good alternative, as they are non-porous and do not absorb smells. Investing in high-quality, freezer-safe containers will significantly reduce the risk of developing freezer burn smells.