Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked for only 13 months

This sharpener did a great job for 13 months and now it has stopped putting a sharp point on pencils. I contacted the manufacturer to get a replacement under their 7 year warranty but was told that "it sounds like the cutters are wearing out. The cutters are considered a normal wearing part. Our warranty is a limited warranty and does not cover wear and tear or normal wearing parts."They then recommended that I switch to a model with replaceable blades. I doubt I am going to go that route since it appears that the replaceable blades are nowhere to be found. Even the Bostitch office website doesn't show any retailers that carry it.Time to go to Costco and get one that I know can be returned if it fails.