I just bought one about a week ago. I also bought a new blade, after I had cut quite a few squares I decided to sharpen it, it was ok but you could tell it was getting on the dull side. Well, to my surprise and disappointment it was worse after the sharpening than before, seemed to have a nick in it. I am hoping that maybe I just got a bad sharpener or pressed to hard or something. I may try to get a new one and see if that helps, tho they are pricey to keep buying, almost three blades.
Donna