You maintain your Melitta coffee machine with a Melitta descaler, Melitta cleaning tablets, and a water filter. When you descale your coffee machine on a regular basis, you can prevent limescale buildup in the pipes. That way, you can extend the lifespan of your coffee machine and retain the delicious coffee taste. In addition, you have to descale the machine with liquid descaler every 3 months on average. With a Melitta cleaning tablet, you can remove coffee rests and grease for proper working of the brew group.