Inspired by professionals and designed for connoisseurs, KRUPS products have been built with three key attributes in mind: Passion, Precision and Perfection. The KRUPS XS3000 Cleaning Tablets are to be used with KRUPS fully automatic machines. They cycle through the machine to clean for future use thus prolonging the life of the machine. We recommend you clean your machine every 360 espresso/coffee preparation. The machine will periodically alert you when to do this. To ensure an even-tasting cup of coffee, cleaning is important. Remember to clean your KRUPS fully automatic machine regularly.