4 hours ago, kmanstudios said:
This is definitely not a humidity issue as humidity would make it softer and not brittle.
In my experience this is not the case.
My filaments, especially PVA, have often become brittle, and drying them out in the oven for 6-8 hours has restored them in all cases.
I've dried out my spool of PVA 3 times now and its still printing flawlessly.
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kmanstudios 1,120
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This is definitely not a humidity issue as humidity would make it softer and not brittle. When you get to an end of a roll, the winding is much tighter and you just may be in the really unusual situation where the PVA is so dry, it cannot relax enough to straighten out enough to feed properly.
This happens on many other filaments as well. But, most are not hygroscopic. As counter intuitive as it may sound, you may need a humidifier in your room to get to around 50% or, just slightly less to let the PVA soften a bit to unwind.
For other filaments, I use those ends as a cleaning filament. PVA may (probably) would not be good for that. But, you can recycle it into water to make a slurry for bed adhesion.
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