How long do you have filament sitting “in the open”? I mostly print with a single filament roll at a time, and just leave it on the printer. A 1kg roll lasts me several weeks. For long time storage I keep it in an air tight box with disiccant pouches.
But how long can I let it sit before I should start storing it with disiccant and/or drying the filament before use?
Everybody is storing it in different conditions. Me for example, my printer is in front of a window that gets afternoon sun.
No cover, no curtains or anything. I just leave my PETG roll on the printer and print whenever I want to. Just recently after like 6 months of not printing I printed something to test without any problems at all…