Hey all, I have a grizzly 12 1/2in planer that I got around christmas time. I've probably planed 800bdft through it. I'm not sure how many passes though 4-8 for each board probably. Anyhow my blades are DEAD I'm not even sure I can sharpen them. Is this normal or premature wear? Half of what I planed was ash and the other half was cherry.