Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The on & off switch broke in less then 6 months!

My first water-pik lasted for a close to 3 years. I ordered second one in February, and noticed they changed the water-pik. I am wondering if this change was a problem.?? I had the second water-pik less then 4 months! Will research other water-piks.