Coffee beans residue, including coffee oils can taint your coffee grinder over time.  To maintain your grinder, it should be cleaned 2-3 times per year.  Grindz will easily remove any coffee residue from your grinder improve its efficiency, life and taste.  This 120g jar is enough for 3 cleanings.  Simple grind these tablets just like you do coffee beans and your grinder is clean!  Formulated for burr and hand-crank grinders.