In addition to the above two, lotus seed core is bitter, but the effect of clearing heart fire is very good. Just soak a few lotus seed cores and let the baby drink a few mouthfuls.
In addition to the above two methods, you can usually add glucose powder or chrysanthemum crystal or milk partner to the milk powder. Don't soak the milk powder too thick.
If the baby is exclusively breastfed, the mother should change from herself. Mother shouldn't eat anything that gets angry easily. She usually eats more fresh fruits and vegetables, not spicy or too sweet, and drinks more boiled water, so that the baby won't get angry if he eats his mother's breast milk.