I have learned through my years of quilting to always buy Olfa or Fiskar blades...the cheaper ones or off brands are usually bad....sounds like you might just have a bad one...I would just change it out and see if the next one works okay...hope your issue gets solved....

Cutters do wear out, The pin the blade is on cuts part way through . Giving you a uneven roll. Takes hours and hours of cutting. I've worn out a few that way. If pin smooth not that,

I have had trouble also with grooves in the cutting mat. If you cut crosswise of the grooves you have made it will miss cutting where it crosses the grooves.

Love this one! had to tell my sister this, with the" ask me how I know" remark

Did that more than 1 blade just recently..Thought dumb blades..Found out it was dumb me. HaHa

Believe me, you are not the only one who has done that. :o

did u call the Fiskar customer service? Their rotary cutters have a lifetime warranty, they've replaced several of mine, no questions asked & I didn't have to return the broken ones. They've also replaced the spring in my Fiskar nippers, sending me several springs for future use.

I thought they were guaranteed for lifetime and you are the only one mentioning that so far.

I use all different brands of blades in all cutters. I've never had a problem. I have several worn out Fiskar cutters but they are years old and have given me more service then I could expect. I will not ask for a replacement because I wore them out. My favorite cutter of all is the Quilter's Select rotary cutter. It's weighted and cuts like butter with any brand blade I use. Right now my favorite blades are Olfa Endurance blades.

It could be the mat. I had the same thing happen. I had bought a new cutter at the quilt show and extra blades but it wouldn't cut, it skipped. I couldn't figure out the problem. Then I tried something, I got a different mat out and it cut great. The mat I was using was new, it was one of the large ones from Joann's that fit on top of my cutting table. well it wasn't self healing because the only place I could cut on that mat was a place that I hadn't cut on before. That was the biggest waste of 50 dollars that I'd done in a long time. Try it and see if a different mat makes a difference.