Maya Ellison
Reusable bags are a sustainable alternative to single-use plastic bags, but they need to be cleaned and maintained to prevent the growth of germs, bacteria, mould, and yeast. The cleaning method depends on the type of reusable bag and its washing instructions. Some bags can be machine-washed, while others should be hand-washed or wiped down with a damp cloth. Regular cleaning and adopting certain habits can prolong the usability of reusable bags while maintaining hygiene and safety.
| Characteristics | Values |
|---|---|
| Purpose of washing reusable bags | To prevent germs, bacteria, mould, yeast and odours from growing |
| How often to wash | After each use |
| Washing methods | Machine wash, hand wash, wipe with a cloth, spray with antibacterial spray cleaner |
| Washing instructions | Check the label, use a gentle cycle, use mild detergent, use warm soapy water, disinfect, air dry, avoid heat |
| Drying instructions | Air dry, avoid machine drying, avoid dryers for plastic-based bags, ensure fully dry before storing |
| Other tips | Wash and dry according to the bag material, wash bags separately for meat, produce and non-food items, perform spot cleaning between full washes, replace worn-out bags |
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What You'll Learn
Washing machine settings and temperatures
The ideal washing machine settings and temperatures for reusable bags depend on the type of material they are made of. Here are some general guidelines:
Cotton Bags
Cotton reusable bags are generally machine washable in cold water. You can use a gentle or delicate cycle with mild detergent. If you are concerned about shrinkage, it is recommended to air dry the bags instead of using a dryer.
Hemp and Bamboo Bags
Hemp and bamboo bags can also be machine washed on a gentle cycle. Mild laundry detergent can be used, and they can be machine or line dried.
Polyester Bags
Some polyester bags, especially those made of "poly-canvas," can be machine washed. Use cold water and avoid putting them in the dryer to prevent shrinkage and wrinkling.
Woven and Non-Woven Polypropylene Bags
Woven polypropylene bags are sturdy and water-resistant, and they can be machine washed on a gentle cycle with mild soap and cold water. However, some sources recommend hand washing non-woven polypropylene bags in warm water with a gentle detergent. Avoid using hot water as it can weaken the material over time. Always air dry these bags completely to prevent mold growth.
Nylon Bags
Nylon bags should be hand washed in warm soapy water. Turn them inside out to ensure thorough cleaning and drying. Hang them to dry completely to prevent moisture retention, which can lead to mold or mildew growth.
Recycled Plastic Bags (RPET or PET)
Recycled polyethylene terephthalate (RPET) or recycled PET (polyethylene terephthalate) bags should be hand-washed with soap and cold water to preserve the material. Leave them open and upright to air dry fully.
It is important to always check the care instructions provided by the manufacturer and test wash if necessary, especially for bags with screen printing or dye. After washing, ensure that the bags are completely dry before storing them in a cool, dry place to prevent bacteria growth.
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Hand washing techniques
Reusable bags are a great eco-friendly alternative to single-use plastics. However, they can accumulate dirt, bacteria, and germs over time due to repeated exposure to groceries, raw produce, and other items. Therefore, it is essential to wash them regularly to maintain hygiene and safety. Here are some detailed hand-washing techniques to ensure your reusable bags are clean and safe for repeated use:
- Empty the Bag: Start by turning the bag inside out and emptying all its contents. This step ensures that you begin with a clear space to work on and no crumbs or debris are left inside.
- Pre-Treat Stains: If there are any visible stains or spots, use a gentle stain remover to treat them before washing. This helps prevent the stains from setting in and makes it easier to remove them.
- Soak in Warm Water: Fill a sink or tub with warm water and add a few drops of mild dish soap or detergent. You can also use a mixture of vinegar, lemon juice, and baking soda for a natural cleaning solution. Soak the bag in this solution for a few minutes to loosen any stuck-on food or grime.
- Scrub Gently: Use a soft sponge, cloth, or a small, soft-bristled bottle brush to gently scrub the bag's interior and exterior. Pay close attention to the seams, nooks, and crannies, as these areas can trap dirt and bacteria.
- Rinse Thoroughly: Rinse the bag well with warm or hot water to remove any soap residue and dislodge any remaining food particles. Ensure that you rinse both the inside and outside of the bag.
- Disinfect: For bags that carry raw foods or have been in contact with meat, it is essential to disinfect them. Use a disinfectant spray or wipe down the surfaces with disinfectant wipes, especially along the seams.
- Air Dry: After washing, hang the bags on a line or lay them flat in a well-ventilated area to air dry completely. Ensure that the bags are entirely dry before storing them to prevent the growth of mold or mildew.
Some specific recommendations for different types of bags include:
- Woven or Nonwoven Polypropylene Bags: Wipe down with a damp cloth using mild soap and warm water. Avoid machine washing as it may damage the structure.
- Nylon or Polyester Bags: Hand wash in warm water with soap. Turn the bags inside out and line dry.
- Cotton Bags: Machine wash with hot water and laundry detergent, or hand wash in cold water if preferred. Machine or line dry.
- Insulated Bags: Hand wash in warm water with soap and pay extra attention to the seams. Disinfect with wipes or a spray solution.
Remember to always check the care instructions provided by the manufacturer, as different bags may have specific cleaning requirements. Additionally, separate bags for different purposes, such as one for meat and another for produce, to avoid cross-contamination.
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Drying methods
Drying reusable bags is an important step in the cleaning process, as improper drying can lead to the growth of mould or bacteria. Here are some methods for drying reusable bags:
Air-drying
Air-drying is a common method for drying reusable bags. It involves hanging the bags on a line or rack in a well-ventilated area to allow them to dry naturally. This method is suitable for most types of reusable bags, including fabric-based bags and plastic-based bags. It is important to ensure that the bags are completely dry before storing them to prevent mould or odours. For bags with sealed edges, it is recommended to avoid turning them inside out as it can harm the seals. Instead, it is suggested to dry them both inside out and right side out to ensure all seams, nooks, and crannies are dry.
Line-drying
Line-drying is another option for drying reusable bags. This method involves hanging the bags on a line or rope, usually outdoors, to dry in the fresh air and sunlight. Line-drying is suitable for bags that can be machine-washed or hand-washed, such as woven and non-woven polypropylene bags, nylon, polyester, bamboo, hemp, and cotton bags. It is important to follow the care instructions provided by the manufacturer when line-drying reusable bags.
Drying racks
Using a drying rack is a convenient way to air-dry reusable bags, especially for bags that cannot be turned inside out. Place the rack in a well-ventilated area and lay the bags flat or hang them over the rack. This method ensures that the bags dry properly and helps maintain their shape.
Bag drying jars
Bag drying jars are a creative way to dry reusable bags, especially for those who have limited space. The jars can be decorated and personalised, making it a fun activity for families. The bags are hung inside the jar, allowing them to dry while being protected from dust or other contaminants.
Avoid heat
It is important to note that high heat should be avoided when drying certain types of bags, especially plastic-based bags. Using dryers or exposing the bags to direct heat can cause warping or melting. Therefore, it is recommended to air-dry or line-dry these bags and avoid using dryers or placing them in hot environments, such as a car trunk, which can promote bacterial growth.
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How to prevent mould
Reusable bags are a great way to reduce your plastic consumption and be more environmentally friendly. However, they can be a breeding ground for germs, bacteria, and mould if not cleaned and stored properly. To prevent mould, follow these steps:
Choose the Right Bag Material
Some reusable bag materials are more prone to mould than others. Opt for materials that are easier to clean and less favourable for mould growth. For example, cotton, bamboo, and hemp bags are machine washable and can be dried without the risk of shrinkage. On the other hand, materials like jute and non-woven polypropylene are trickier to clean and may require more effort to prevent mould.
Wash Regularly
It is essential to wash your reusable bags regularly, ideally after each use. This helps prevent the build-up of dirt, bacteria, and food residues that can lead to mould growth. If you can't wash your bags after every use, consider freshening them up in the dryer on high heat to kill germs temporarily.
Wash Properly
Different bag materials require different cleaning methods. For example, cotton and hemp bags can be machine washed with laundry detergent and hot water, while polypropylene and polyester bags should be hand washed in warm water and soap. Always follow the care instructions provided by the manufacturer. Pay close attention to the seams and nooks of the bags to ensure thorough cleaning.
Dry Thoroughly
Ensure that your reusable bags are completely dry before storing them. Moisture trapped in the bags can lead to mould growth. Air-dry the bags in a well-ventilated area, and consider hanging them inside out and right side out to ensure all parts of the bag are dry. Do not store damp bags, as this creates an ideal environment for mildew and mould to thrive.
Store Properly
Store your clean and dry bags in a cool, dry place at home. Avoid storing them in your car trunk, as the warm and humid environment promotes bacteria and mould growth. Keep food-specific bags separate from those used for non-food items like books or sports gear. Additionally, designate specific bags for different types of food, such as raw meat, produce, and prepackaged goods, to prevent cross-contamination.
By following these steps, you can effectively prevent mould and maintain the hygiene and longevity of your reusable bags, making them a safe and sustainable choice for the environment and your health.
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Sanitising and disinfection
Sanitising and disinfecting your reusable bags is an essential step in maintaining hygiene and safety. Reusable bags can accumulate bacteria, dirt, and germs over time, which can lead to potential health risks if not properly sanitised.
To disinfect your reusable bags, start by identifying the type of bag you have, as different materials require specific care instructions. For plastic-based bags, hand-washing is recommended. Use warm soapy water and a soft cloth or sponge to clean the bag. Pay special attention to the seams and nooks, as dirt and bacteria can accumulate in these areas. After washing, rinse the bag thoroughly and wipe it down with a disinfecting solution. You can make your own eco-friendly disinfectant by mixing equal parts water and white vinegar in a spray bottle. Alternatively, you can use store-bought disinfectant sprays or wipes, being sure to follow the instructions on the label.
For insulated bags, which are typically made of heavy-duty nylon or polyethylene vinyl acetate (PEVA), hand-washing is also recommended. Use warm water and soap to clean the bag, and be sure to wipe down the seams and any zippers or clasps. Once cleaned, spray the bag with a disinfectant solution and wipe it down. Allow the bag to air dry completely before storing it.
Canvas and cloth bags can be washed in hot water with detergent using a conventional washing machine or by hand. These bags can also be dried in a dryer or air-dried. However, it is important to check the care label on the bag, as some canvas and cloth totes may have specific instructions to preserve colour and fibre integrity.
Regardless of the bag type, always ensure that your bags are completely dry before storing them to prevent the growth of mildew, mould, or bacteria. Store your bags in a cool, dry place at home, avoiding warm and humid environments like your car trunk, which can promote bacterial growth.
By regularly sanitising and disinfecting your reusable bags, you can help prevent the spread of germs and maintain the functionality and safety of your bags.
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Frequently asked questions
It is recommended to wash your reusable bags after each use to prevent the growth of germs, bacteria, mould, and yeast.
Hand-wash plastic-based bags with warm soapy water using a soft cloth or sponge. Wipe down surfaces with a disinfectant, especially if the bag carried raw foods. Air-dry the bag by hanging it on a line or laying it flat in a well-ventilated area.
Machine-wash fabric-based bags using a delicate cycle with mild detergent. You can also hand-wash fabric-based bags with warm water and soap. Air-dry the bag by hanging it on a line or laying it flat in a well-ventilated area.
Woven and non-woven polypropylene bags can be machine-washed on a gentle cycle or hand-washed with soap and warm water. Only line dry these bags.
Insulated bags should be hand-washed with warm water and soap, or wiped with disinfecting or anti-bacterial wipes, especially along the seams. Line dry these bags.
