that's funny you said that. I was dealing with that just yesterday. So, instead of "changing" it, I tried sharpening it with that little blue gadget that helps a little. Well, I went back to cut again....NOT!! So, again, instead of actually changing the blade, I went and got my other cutter. But, I have new blades sitting by my sewing table and the cutter that needs changing. I'll do that today.
I guess I didn't want to take the time to do it right and tried to get every last bit of cutting ability out of that blade. Shame on me. LOL