I have the TrueCut Rotary Blade Sharpener by Grace Co. It works better than any of the other sharpeners I've tried. It will keep the blade sharp but won't take out a nick in the blade. The way to use a sharpener is to not wait for the blade to get dull. Sharpen a sharp blade and it will stay sharp. I ordered a couple of the Sharpening Rulers that sharpen the blade as you cut. They are suppose to be very efficient in keeping the blade sharp too.