Coffee Burr Grinder
3. Lift the upper burr disk out of the grinder. Note: Do not unscrew the upper burr from its housing! 4. Clean both the removable upper burr disk, and the permanent lower burr disk with a brush. Note: Never use water to clean the burr disks! 5. To reinsert the upper burr disk, set the fineness selector dial to the coarse grind setting.