The scabs , crusts , dried serum .
Dirt should be removed very gently by using mild soap or natural mild shampoo , a mild chlorhexidine ( maximum 2 % ) or povidone - iodine wash and a small amount of lukewarm water or physiological saline .
The scabs , crusts , dried serum and dirt should be removed very gently by using mild soap or natural mild shampoo , a mild chlorhexidine ( maximum 2 % ) or povidone - iodine wash and a small amount of lukewarm water or physiological saline .