Warm reminder: Cleansing of traceless underwear: 1. Use hand washing underwear, and the temperature of the water should be below 40 degrees 2. Use special detergent for underwear to prevent fading. Do not use bleach and disinfectant. 3. When washing, rub it gently with your hands, try to complete the washing in the shortest time, pat dry with a dry towel or gently shake the water dry, do not dehydrate, do not wash it in the washing machine to avoid deformation 4. After cleaning, tidy up the underwear and use clothespins to clamp the bottom of the cup to hang upside down 5. Dark clothes should be washed and dried separately. The first time you wash them in water, you can soak them in warm cold water with edible salt, and then clean them to avoid washing and dyeing.