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

I bought this can opener in December 2009 and I need to replace it. The lever has become almost impossible to lift in order to fit the can on the opener. I'm not sure what the issue is--I think the blade is rubbing up against the back of the attachment. When I do manage to get the can in place, it takes a lot of pushing to get the blade to set. While the can opener is running, it's ripping the paper on the can.