Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Malfunction after 6 months

THE ALARM STOPPED WORKING! Nothing else matters if the alarm doesn't wake you up! The bad part is that the problem is intermittent; The first time it happened I thought is was my fault for not setting it correctly. The second time I knew it wasn't my fault because I made sure the correct time was set, that I had the correct AM/PM setting, and that the alarm switch was set in the right position for alarm.