Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Smelled like burning plastic

I purchased this to use in my one-year-old's room. I specifically got this one because it has the plastic protector so he doesn't burn himself if he somehow touched it. Well, I have been disappointed on all fronts.Even after rinsing it out, the unit smelled like burned plastic when I plugged it in. I added salt, I made sure not to fill it above the fill line, I followed the directions perfectly but it still stunk! I was worried and did not want my son to be inhaling burned plastic! I thought to myself that maybe it just smells that way because this is the first time it was used. I set it up in the guest room and used it three other times and each time, it still smelled like burned plastic. Worst of all, even with the steam guard, you still burn your fingers if you touch it.I figured I gave this thing enough chances and wound up returning it.