Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Not relaxing

I bought another version of this sound machine a few years back and it worked great for a while. Then it started making loud buzzing noises every once in while (when I was trying to sleep). I figured I had worn it out since I used it every night, all night, while I was sleeping. So I decided to buy another one. This one made the same loud buzzing noise the second night I used it.