Using your Cole & Mason salt mill is a breeze. To refill, simply remove the push-top cap and add salt. Adjust the grind size by twisting the stainless steel collar. For a coarse grind, turn it one way; for a fine grind, turn it the other. Use a coarse grind on mozzarella for a bold flavor, a medium setting on pizzas, and a fine setting for dressings and sauces. When it comes to maintenance, keep the mill dry to prevent rusting of the stainless steel parts. Wipe it clean with a soft, dry cloth after each use. Don't submerge the mill in water as it could damage the internal mechanism. And with its lifetime guarantee, you can use it with confidence for years to come.