Honey, I also bought an 89 1 coffee machine. Will a cup of coffee every day refresh me? When the machine reminds you of the need for descaling, krups special descaling powder is needed. Add the water in the water tank to the water level, pour in the descaling powder, stir evenly with chopsticks until it melts, and then continue to operate according to the screen display of the machine! Descaling is divided into two steps. The first step is to use detergent powder. Step 2, the water tank needs to be cleaned and filled with water for cleaning. Pay attention to empty the water in the drip tray in time.