For anyone still following this tale of PETG tribulation:
For a day, I need to use PLA. I have removed the PETG from the extruder. Is there something I need to do special to put in PLA? Like to remove whatever bits of PETG are still in the extruder? Should I tell the filament loader to still use PETG? So it melts the PETG remnants?
I found some silica gel with colorant. It was not full blue, so I baked it at 275 for 15 minutes and the color was restored to full blue. I put about 4 oz of it into a small cloth bag. I put this bag in the filament bag, along with the red PETG. At least the PETG filament will be passively drying some while I am using the PLA. I have another 4-5 oz of silica gel in a glass jar, but I can't get the lid off! Need to go find a pipe wrench to gently start it turning. The rubber gripper didn't help.
Once I get a couple of PLA prints done, then I can get back to figuring out this PETG critter. The minimum temp on our gas oven is 150F. That is 65.5C. Is that ok to dry this PETG? Or is it too hot?