Shoes yellow after washing with washing powder, there may be the following reasons:
1. The stain is not cleaned, and it will be obvious after drying, showing yellow stains;
2. The detergent is not cleaned, which leads to yellowing after drying;
3, the water is hard or yellow;
4. Yellowing caused by exposure to sunlight after washing.
If the shoes are yellow after washing caused by the first three conditions, the laundry detergent can be diluted with water, and then soaked in the shoes for 5 minutes, and then gently brush the yellow part with a soft brush, which can generally reduce or remove yellow stains. If the last situation causes yellowing, the shoe material itself has been damaged, is permanent, and is generally not removed.
The most likely reason is because the laundry detergent (or soap) is still left on the shoes, not completely rinsed out, and it is easy to yellow in the sun. They should be rinsed several times, and then thinly wrapped with white toilet paper. They should not be placed in the sun, but should be dried in a well-ventilated place.
Because you do not wash the cleaning agent completely clean the shoes, the chemical ingredients inside the shoes remain, dry, the water is no longer, it becomes yellow. So when washing shoes, be sure to clean the detergent, and then cover with toilet paper to dry it will not turn yellow. Remember to wash and brush with clean water and dry in a cool place