Wier bought two Lufentfeuchter. One for the pantry and one for the guest room.
The problems described the hardening of the granules were with us as well, I have the bag then always aufggeweicht mmit hand and it changes after a certain time and when I looked into the container after 2-3 weeks were those full of water.
I have to say that work the dehumidifier with us easily
I am going to buy the refills and see whether repeated this effect.