Sharpen a Dull Blender Blade By Fixit guy in LivingKitchen5,4954Save PDFFavoriteIntroduction: Sharpen a Dull Blender BladeBy Fixit guyLarry PierceFollow More by the author: About: I am the author of "The Art of Fixing Things," www.theartoffixingthings.com More About Fixit guy » Use a flat Oregon chain saw file. Cut on the forward stroke, not the back stroke. Get out the Tequilla.