Instruct: Classify Amazon reviews into positive or negative sentiment
Query: White Dust

I am very unhappy with the the Vicks Cool Mist Humidifier. We have white dust all over the nursery and it is very difficult to get out. Our son was sick and we wanted to use the humidifier to help him breath, but instead he ended up breathing the white dust. We used distilled bottled water so I dont undertand how this could occur. I would definetly not recommend this. Our pediatrician has even told us not to use it anymore. I rate this very poorly