Coffee is a natural product. When capsules have been used and are open, the wet coffee grounds will start to biodegrade, which may ultimately result in the formation of mould. The formation of mould is a natural process of decomposition, as for any organic matter.
Nespresso recommends regularly changing the recycling bag and not leaving used capsules – just like other organic kitchen waste for long period in the bag or container in the kitchen and to store bigger amount of used capsules in an outside trash-bin.
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