Are you cutting from the front to the back? are you cutting across your body? Are you using a cutting mat? I was talking to a lady today and she was using a piece of gyproc (sheetrock) to cut on...not so good for the cutter. Why are you changing the cutter, when you can just change the blades. I saw a video, not too long ago, where the quilter was using the hand sharpener and she sprayed the sharpener paper with water before turning the blade on it and she had been using the same blade for months.