This does absolutely nothing except waste electricity. I looked at the reviews before I added it to my baby registry thinking it was the best one out there. Nope, not true at all. Very disappointed, I would give it 0 stars if it was an option. I just recently purchased the Vicks Warm mist humidifier that you can add the vaporizer. It is pefect, and it works! The room stays warm and you can feel the humidity when you walk into the room. My daughter sleeps so much better with it, her nose doesn't get as stuffy and her cough subsides allowing her to get a good nights rest. I will give THAT one 10 stars!