Duhhhh. Loosen up
I'm trimming some blocks. My cutter seems dull. Thought it might need changing, but being lazy (having to move this to get to that, so I can open the drawer to get the blades, etc) I just kept cutting. Remembered a conversation about the blade having to turn as it cut. Looked at cutter and it was screwed all the way tight. What if I loosened it a little!? Ah ha! It worked a little better. Loosened it more, it worked even better. Well, you get the picture. Wonder how many good cutters I tossed thinking it was dull when maybe all it needed was a little room to do its job. We are taught to tighten something all the way; so try this before you toss. Couldn't hurt, might work!