The Urnex Grindz™ Grinder Cleaning Tablets are Formaulated from all natural plant-based ingredients, and does not contain phosphates. All the ingredients are food safe, gluten free and organic. They clean grinder burrs and casings which helps to extend the life of the grinder. Grindz™ Grinder Cleaning Tablets remove stale coffee residue and flavoured coffee odours. No grinder disassembly is necessary.