From the Bar Keeper's Friend Collection. Cleaning and descaling are two different processes that tackle two different problems when brewing coffee. Coffee must be brewed at the optimum temperature for optimum taste and this descaler makes this possible by allowing the heating coils to function properly by removing, dissolving, and destroying mineral scale from the water reservoir and coils. Please note: Actual product packaging and materials may contain more and different information than what is shown on the website. It is recommended that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product.