Here’s a tip for all you coffee addicted home grinders: If your grinder has a funk to it, grind a handful of rice grains. “The fine particles will absorb stale odors and clean out residual grounds and oil”. Run it through twice for a bonus clean, and then just discard the rice when you’re done and wipe it clean. For the perfectionist, you may want to run a throw away batch of beans through first, just to remove all of the rice residue, but most will find that just a single pass does the trick. Neat.