When use a humidifier safely and effectively?

It's a cool mist humidifier and I prefer these because they are safer than the warm air humidifier and also Crane's humidifiers are really easy to keep clean and bacteria free. Daily use a little warm water and some distilled white vinegar you can find these in your local grocery store when we're filling your baby's humidifier use some clean distilled water for each. Learn more about it here. https://besthumidifierhub.com/best-humidifier-for-baby

I would only use a humidifier if your humidity is really, really low. Maybe 20% or less. Consult your doctor if there are medical issues at stake.