Instruct: Classify Amazon reviews into positive or negative sentiment
Query: FAILED! in less than 4 hours

I bought this in the morning. Returned it 4 hours later!Failed to emit and properly work within those 4 hours!Do not be fooled by the sophistication of the product(UV Light). Seems like an afterthought to poor function.I read other reviews that this could start a fire. Who wants a humidifier that could essentially start a fire anyways.This will break down on you eventually look at other popular brands in the same price range. Definitely read the reviews.Beware the Bionaire!!