Bar Keepers Friend Coffee Maker Descaler removes mineral deposits that can harm the heating element and alter the flavor of coffee. It’s safe to use on automatic drip and single-serve coffee machines (for best results, use Bar Keepers Friend Coffee Maker Cleaner after descaling). Cover natural stone countertops before descaling, to protect surfaces from spills and splashes. Protective gloves are recommended. Always read your appliance manufacturer’s recommendations before descaling or cleaning. – Removes mineral build-up that can damage coffee makers, espresso machines and single-cup machines- Descales heating element, ensuring peak brewing temperature- Product’s 12-ounce size allows for multiple descalings throughout the year- Improves coffee flavor- Use regularly to prolong life of coffee maker