Instruct: Classify a given review as either positive or negative.
Query: BE WARY

I have been using this product off and on for a couple of years. Probably not more than 20-30 nights. My son has been fighting a cough and we filled the vaporizer and put it in his room. Early in the morning I heard a loud "pop" and a "gurgle" noise and went to inspect. His room was full of smoke and a horrendous sulfur like smell. I can't believe this product is capable of doing this, and it's not a new problem. See this link:[...]Vick's needs to fix this product/get it off the shelves/recall old units. I truly hope that my son has not been harmed.STAY AWAY FROM THIS PRODUCT!