Soaking curtains with warm water and edible salt can remove some formaldehyde from curtains; If the smell is still strong after cleaning, you can spray curtains with professional in addition to formaldehyde products. Do not use bleach to clean the curtains, do not dry them, and then it is best to dry them naturally.
2. About the smell on the shading curtain:
Due to the chemical layer added on the surface of some cheap shading curtains, exposure to the sun will volatilize toxic gases, but those toxic substances can not be washed clean, so when choosing shading curtains, we still have to choose physical shading curtains.
It is often said that pineapple peel and grapefruit peel can be used to remove formaldehyde, but these methods can only cover up the smell of formaldehyde, but not remove it. Therefore, in order to remove the odor from the curtains, we need cleaning+ventilation, and some auxiliary means, such as placing in addition to formaldehyde plants indoors and so on.