D.S.
Hi, N.:
Some babies have more mucus than others. When the baby starts choking on the mucus put the baby on your arm like a football. Lower her head and pat her on the back so the mucus will drain out like gravity.
You can put a vaporizer around her to make the mucus thin. You can hold the baby like a football frequently and pat the baby's back. You don't have to wait until the baby's mucus builds up.
Just a thought.
Good luck.
D.