Ethan Clarke
Food stains on plastic containers are unsightly and off-putting, especially when you're about to eat. While these stains do not indicate that the container is unsafe or unclean, they can be difficult to remove. There are several methods to clean discoloured plastic food containers, including using vinegar, baking soda, denture-cleaning tablets, hand sanitiser, and even sunlight. Each method varies in effectiveness depending on the type and age of the stain.
| Characteristics | Values |
|---|---|
| Cleaning agent | Baking soda, vinegar, hand sanitizer, dish soap, denture-cleaning tablet, bleach, rubbing alcohol, sunshine |
| Container type | Plastic |
| Stain type | Food, discolouration |
| Stain colour | Yellow, orange, brown |
| Stain cause | Tomato sauce, turmeric, age |
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Using vinegar and water
Vinegar is a natural cleaner that is generally safe to use on most types of plastic without causing any damage. It is also naturally antimicrobial, which makes it useful for killing the bacteria that may have grown on old food.
To clean discoloured plastic food containers with vinegar and water, start by removing the lid from the container and giving it a quick preliminary rinse with hot water to remove any food remnants. Drain and shake out the excess water.
Next, make a solution of water and vinegar. The general recommendation is to use equal parts of vinegar and water, or 1 tablespoon of vinegar per 1 cup of water. If the container has stubborn stains, you can use a stronger solution of 30% cleaning vinegar. Fill the container with the vinegar solution, ensuring that the vinegar covers all the stained areas.
Place the lid back on the container and let the solution sit for 30 minutes to 2 hours. The acidity of the vinegar will help break down any discolouration and neutralise odours. For heavier stains, you can leave the vinegar in the container for longer before cleaning it out by hand.
After the vinegar solution has had time to work, pour it out of the container and scrub the container with a sponge or brush, adding a few drops of liquid dish detergent. Rinse the container with warm or hot water and let it dry.
It is important to note that while vinegar is effective at removing stains, it can be too strong for some plastics. Therefore, it is recommended to dilute vinegar with water for lighter stains to prevent the plastic from wearing down.
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Baking soda and water
Once you're happy with the consistency, spread the paste over the stained areas of the container. You can use a soft sponge or a damp cloth to work the paste into the plastic. For particularly stubborn stains, use a thick layer of paste. Allow the paste to sit for 15 to 30 minutes. If the stains are especially tough, you might want to let the paste work overnight.
After letting the paste do its work, use a damp cloth or sponge to wipe away the paste, rubbing it into the bottom of the container well. Finally, rinse the container with warm water and, if desired, wash it with soapy water. Repeat the process if necessary.
For regular cleaning, a good pour of baking soda added to a wet container can remove tea dyes from the interior of a plastic pitcher. Baking soda can also be used to eliminate odours. Simply coat the inside of the container with baking soda, using a gentle dish sponge to rub it into the plastic, and then rinse well.
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Bleach
To clean a discoloured plastic food container with bleach, start by mixing one part chlorine bleach with ten parts water. This will create a potent bleach solution. It is important to wear rubber gloves when handling bleach and to ensure the work area is well-ventilated.
Once the solution is ready, apply it to the stained area of the container using a sponge or a damp cloth. Allow the solution to sit on the stain for 10 to 15 minutes. For tougher stains, you can increase the concentration of bleach in the solution by using one tablespoon of bleach for every cup of water.
After the solution has had time to work, wash the container in hot, soapy water to remove any remaining bleach residue. Rinse the container thoroughly with clean water to ensure no bleach remains. Finally, allow the container to air dry.
For an even stronger bleaching effect, you can fill the entire container with a bleach solution and let it sit for up to 24 hours. This is especially effective for severe stains. After soaking, pour the bleach solution down the sink and wash the container in hot, soapy water as usual.
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Sunlight
To clean your plastic food containers using sunlight, start by washing the containers thoroughly with hot, sudsy water and a sponge or microfiber cloth. If the stains are particularly stubborn, you may need to wash the containers a second time or run them through a dishwasher cycle.
Once your containers are clean, place them outside in direct sunlight. It is recommended to leave them for at least eight hours to ensure the sun's rays have time to work on the stains. If you don't have access to direct sunlight, you can also try placing the containers under ultraviolet germicidal lamps, which can be purchased online.
For an even more intensive treatment, combine sunlight with other cleaning agents. Soaking plastic containers in lemon juice or a mixture of peroxide and water before placing them in the sun can enhance the stain-removing effect. Rinse and dry the containers after soaking and sun exposure.
While sunlight is a natural and effective way to remove stains, it may not work in mild climates or during winter. In these cases, alternative cleaning methods, such as using bleach or vinegar, may be more practical.
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Denture-cleaning tablets
Denture tablets are a great way to clean discoloured plastic food containers without using harsh chemicals. They contain a combination of mild bleach, citric acid and baking soda, which makes them excellent at removing stains. Here is a step-by-step guide on how to use denture tablets to clean your plastic containers:
- Start by filling the container with warm water. The water temperature should be hot but not boiling, as you will need to handle the container.
- Add two denture tablets to the water. If your container is large, you may need to add three tablets for maximum cleaning power.
- Allow the tablets to dissolve and fizz. You can swish the solution around gently to ensure the tablets dissolve completely.
- Let the solution sit for at least a couple of hours. For tougher stains, such as those from tomato-based foods, it is recommended to leave the container to soak overnight.
- After the soaking period, pour out the solution.
- Wash the container thoroughly with hot, soapy water and rinse with warm water.
- Dry the container immediately with a towel. This step is crucial, as it prevents hard water stains from forming on the plastic.
Denture tablets are a convenient and mild cleaning agent that can be used on various items around the house, including crockpots, coffee makers, and jewellery. They are also useful for removing mineral deposits and descaling electric kettles. Always remember to keep denture tablets in a sealed container and securely stored away, out of the reach of children and pets.
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Frequently asked questions
Mix 1 cup of hot water with 1 tablespoon of vinegar in the stained container. Leave the solution for at least 1 hour, or as long as overnight. Rinse the container and wash it with dish soap to remove the vinegar scent.
Mix 2 tablespoons of baking soda with 1 teaspoon of water to form a paste. Apply the paste to the stained areas of the container and let it sit for 30 minutes to 2-3 hours. Wipe the paste with a damp cloth, then rinse with dish soap and warm water.
Bleach is the strongest option for removing stains. Wash the containers thoroughly after treating them with bleach to avoid leaving any trace amounts behind.
Discolouration usually happens when a container filled with tomato-based sauce is heated in the microwave. To prevent discolouration, use glass containers or line the plastic container with a silicone cup before filling it with food.
