Have you tried another on out of the package? If they are all nicked, take the back where you bought the and ask for a refund.
I was fighting the same problem you have....sometimes it felt like the darn thing had a flat tire, it would bump bump across the mat. Then sometimes, I would get the one or two threads that didn't cut. I put in a new blade from a new packing and have cut out two quilts with it and it is doing fine.
I think I kept nicking the blade on my ruler when I first put the cutter next to it, I would get on the mat...I have been especially careful when setting the cutter next to my mat since buying the new blades.
Originally Posted by skavanau
Im at that point now. I keep cutting and it keeps cutting , but it leaves a little section that doesnt cut and when I remove the ruler, well thats not funny. An the thing is, I have a new package , just havent changed them...