Central Europe. I’d say it’s not too bad, but the printer is in a basement which tends to be humid…

I already got myself a dryer as I suspected that. But this occurs in multiple filaments, brand new and older ones, different brands. To me it somehow feels like this is not the root cause… But I’ll keep an eye on that.

The filament is brand new, I also tried other brands and types of different age so I assume it is independent of the filament.

Well, the PETG is brand new and I use a heated chamber for the filament, so I really hope this is not the case. But as the setup sits in a basement, I’ll try to check that, too.