sewNso

I finally bought a hand held blade sharpner with a 50% off coupon. don't know why I have't gotten one before. easy to operate. just slip the blade between two little spindles, screw them together, then rub a few times on the 'sand paper'. about the same price as a 5 pack of rotary blades. then 50% off. the re sharpened blades worked like new.

Monroe

I've used one, but it didn't work for more than about 3 blades as the sandpaper discs wear off.

snipforfun

I invested in the Tru Sharp sharpener. Worth every cent. They can be found at reasonable prices. Amazon, or joann.com with a coupon