It really is that ...

the one needs this not just cheap stuff. Or to use extremely soft water. Our Entkalkungsrythmus is about 8 weeks, we have a pad machine, and we are not extreme coffee drinkers (but it runs every day for four cups in any case). Since the descaling can very pretty penny. So a large supply pack is already announced. It would be nice if that were even cheaper. This cost factor I had not seen before. And common household remedies I would not use it in an expensive coffee pod machine.