Traditional Culture Encyclopedia - Traditional stories - What should I do if the backstrap of my school bag is yellowing? How to remove

What should I do if the backstrap of my school bag is yellowing? How to remove

What causes the yellowing? If it is caused by sweat staining over time, it can be solved. First of all, the backpack straps soaked in laundry detergent foam for a period of time, and then cleaned in the usual way to remove the stains, and then to the backpack straps yellowed places coated with toothpaste with a toothbrush patiently brush. After brushing the strap to dry to the ventilation, do not sun exposure.