1. Check what material the icon is made of. If it is embroidered, use a knife to break it up.

2. If it is printed, use strong washing powder and wash it several times in the washing machine.

3. For school uniforms made of pure cotton, use nail polish remover!

4. Wash with gasoline or use 84 disinfectant.

5. Apply a small amount of gasoline, then mix some detergent and detergent with warm water and scrub slowly.