Like all Full Circle™ products, Full Circle™ Coffee Grinder Cleaning Tablets are completely phosphate free, made entirely of renewable, sustainable and naturally occurring ingredients. When ground through your coffee grinder, Full Circle™ patented, food safe grinder cleaning tablets are an easy way to remove the coffee residue and oil that lead to bitter tasting coffee—all without removing any parts of your machine. Cleaning with Full Circle™ grinder cleaning tablets is far easier than opening or disassembling a grinder. Cleaning a grinder is a challenge because water cannot be used on the burrs or around electric motors. It is recommended to use Full Circle™ coffee grinder cleaning tablets once a month or when switching between flavored, decaffeinated, and regular beans.