Yes, nasal aspirators are effective in removing mucus from a baby's nose. Mucus can cause a baby to feel congested and uncomfortable, and can also make it difficult for the baby to breathe. A nasal aspirator is a tool that can be used to remove the mucus from a baby's nose. Nasal aspirators come in two varieties: manual and electronic. Manual nasal aspirators require you to suck the mucus out of the baby's nose, while electronic nasal aspirators use a motor to create suction. Both types of nasal aspirators are effective in removing mucus from a baby's nose.