Hello. According to the BA, every 12 months. There are also small adhesives, such as inspection stickers. It is worth it.

When the silver has been used up, the remaining plastic part can be disposed of with household waste.

The cube must be free of all packaging and protective material. It is clipped to the bottom of the bin in the place provided by the manufacturer.

Fits perfectly - that's exactly how I use it :)

Exactly, this is a single pack. Due to different suppliers and delivery conditions, there may be price differences compared to other suppliers. We always try to set a price in line with the market, but this is not possible for all products.

Correct - and this is not only the case with Stadler (air humidifiers/cleaners), but also with Bonecos, for example - they also offer silver nitrite sticks (so that they are clean and germ-free and last longer). It is indeed cheaper to change the water (and we clean the water tank and the water filter at regular intervals in the washing machine, Boneco also states that this is how it works). Is this not possible and if you don't want to shell out the money for such a "silver cube": In the outdoor accessories market there are water disinfection and preservation liquids for little money, 1 single drop of which should be more than enough (so that such a cheap bottle then lasts an extremely long time)). Sorry for texting you... Conclusion: No, you don't really need it, if you do: there are alternatives. LG, have a nice weekend

It is expensive, but it also lasts a whole season.

Yes, I also have this from time to time despite the silver cube. Thorough cleaning and changing the filter helps.

At most if you find limescale on the cube, otherwise just put both in the water. You don't see the effect, it helps against bacteria and maybe a little against biofilm (slime).