There are two types of humidifiers to choose from, one being a cool mist and the other being a warm mist humidifier for baby. The cool mist requires more cleaning and maintenance as opposed to a warm mist humidifier. In addition there are several makes and models to choose from. There are many factors to take into consideration when choosing the best humidifier for a baby.
Source: http://omgstroller.com/best-baby-humidifier-reviews