Humidity and dust are natural enemies of filament spools. Some materials have no problems with humidity. Others, such as PVA or nylon, are very hygroscopic and absorb moisture after a short time.
A wet filament can be easily recognized by the sizzling noise during printing – and its horrible print result. More information on how to detect and dry damp filament can be found in our article How to Dry Filament.
Then, there’s dust. It can also settle on the filament and then get into the nozzle and clog it. Under extrusion or a failed print job is the result most of the time.
Therefore, it is especially important to store filament spools carefully and correctly. Here are some solutions so that your material can be printed flawlessly – even after a long pause in printing.