If your backpack gets extremely dirty or smells like mildew, washing it will help to restore it to a clean and safe state. It is best to wash a backpack by hand to prevent it from being damaged in the washing machine, but if that is not possible then you can use a dryer as well.
Before you do any washing, it is a good idea to check the care label on the inside of the bag for cleaning instructions. It is also a good idea to remove any metal frames and detachable straps and hip belts before you start washing as these can be damaged in the washing machine. You will also want to empty out the contents of the backpack and shake it down to get rid of any crumbs or trash that may have accumulated in there.
To start the cleaning process, mix your chosen cleaner with warm water until subtle suds form. Then, using a cleaning cloth or rag, gently dab the stained or dirty areas of the backpack. If the stains are very stubborn, you may have to scrub at them to remove them completely. Be careful not to use too much cleaning solution as this could damage the fabric of the backpack.
When you are finished, it is a good idea to blot the backpack with a dry cloth to remove any excess moisture. After that, you will need to hang the backpack up and allow it to dry completely before reusing it. This is a very important step as it will prevent mold and bacteria from growing on the backpack which could lead to skin irritation or even serious illness.
After the backpack is completely dry, it should be repacked and stored properly. Ideally, the backpack should be hanged up somewhere breezy and not in direct sunlight. If possible, it should be placed in a well ventilated area to avoid any odors from accumulating. It is also a good idea to regularly shake out the pockets of the backpack as it can be easy to forget about garbage in these hidden pockets and it can become very smelly.
Washing your backpack on a regular basis will keep it in a good condition and make it last longer. It will also protect your clothes and other items that you store in the backpack. You should always remember to wash your backpack in the right conditions and never leave it in the washer for too long as this can cause zippers to seal shut and will not give the bag the protection that it needs. It is also a good idea to use a laundry detergent that is suitable for backpacks to avoid damaging the fabric. In addition, you should also try to rinse the bag as thoroughly as possible after each washing. This will help to prevent mold and mildew from forming on the bag. Finally, you should also dry the backpack by hanging it up to prevent the bag from becoming wrinkled.