Am I Experiencing A PETG Issue - What causes this?

I just bought a filament dryer and tested it with a role of PETG. I know, that PETG absorbs moisture. But I never expected the difference it makes, even though I always keep the filament in the AMS or wrapped in foil with desiccant.


On the left side the PETG, how I had used it the last weeks. My prints of functional parts with this were okay. But now, after drying the result of the stringing test looks much much better. I’m very astonished! :smiley:

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