I have used PVA dissolvable material in my S5 for awhile. However, with this spool that was fine initially, it now is starting to flow poorly, not stick as well to the glass, and is badically looking ragged instead of smooth. All the same settings.
The only thing that helped a little bit was increasing the temp by 15C, but still is quite poor.
So, I am wondering if this material degrades over time when the plastic wrapping is removed and exposed to air?