Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 3 strikes and out

I've had three of these and my last one just died after only 8 months of use. The last two got where they would not shut off unless you put it on the charger; the switch would not turn it off so picture this; squirting toothpaste in your mouth first then trying to push it around in your mouth while you brush. When the toothbrush works they are great but I'm done.