There is an address for sending them old ones away and getting others back. I'll see if I can find it. Make sure you don't sharpen the blade unevenly. I think I mean consistent pressure.,
I have an Olfa Rotary cutter and have just sent off to Amazon for some replacement blades - again! I seem to remember reading somewhere that they can be re-sharpened. Does anyone know if this is possible and where I can get it done. Each blade is about £3.45 and I don't know if it's worth it financially to re-sharpen them. Thanks for any answers.