Clothes are inseparable from formaldehyde during processing. It can be used for wrinkle removal, corrosion protection and color retention, so new clothes will have formaldehyde residue. Formaldehyde is easy to dissolve in water, and washing with water can wash away most of the harmful substances such as formaldehyde on clothes. Add a spoonful of table salt in clean water. Table salt has the effect of disinfecting, sterilizing, and discoloring. You can also add a small amount of laundry detergent for cleaning.
2. Underwear should be washed by hand with a "light press" method, especially for bras with underwires. Don't twist them hard.
3. Special soap or laundry detergent for underwear will make the underwear cleaner and softer after washing.
4. To wash underwear, first dissolve the laundry detergent in warm water at 30~40℃, and put it into the bra after it is completely dissolved. Do not apply laundry detergent directly on the bra.
5. (Lazy) When machine washing underwear (the washing label on the bra does not specifically indicate that it must be hand washed), put it in the underwear laundry bag. For machine-washed bras, choose a gentle gear, don’t take too long, three to five minutes, and be sure to use cold water.