This was one of two issues (or a combination of both).   My nylon may have gotten a little damp. I store it in a drybox, but haven’t yet built one I can print from. RElative humidity in the house sits around 50%. So I dried the filament overnight sitting on the build plate at 90c with a towel over it. I used the towel to pick up the roll and put it directly to the drybox to cool.   i also realized that we had some warm days that caused the AC to kick on. There is a vent in th