Yeah, the whole "glue in that plywood" thing used to sound like nonsense to me. I figured a blade was just dull, you know? But @skyler921 is totally right, that resin is basically full of grit and it absolutely wrecks the edge (I learned that the hard way on a project last year). It's like sanding with super fine glass paper every time you cut. Makes you change how you work with the stuff for sure.