Core One+, PETG, clumping and irregular final surface - How do I print this? (Printing help) https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-petg-clumping-and-irregular-final-surface/ Prusa3D Forum Discussion Board en-US Fri, 12 Jun 2026 05:01:06 +0000 wpForo 60 RE: Core One+, PETG, clumping and irregular final surface https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-petg-clumping-and-irregular-final-surface/#post-781810 Wed, 11 Feb 2026 17:48:35 +0000 First I would dry the filament at 60C for 8hrs. You'll be surprised how often print quality issues come about due to damp filament. 

]]> How do I print this? (Printing help) hyiger https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-petg-clumping-and-irregular-final-surface/#post-781810 Core One+, PETG, clumping and irregular final surface https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-petg-clumping-and-irregular-final-surface/#post-781765 Wed, 11 Feb 2026 14:18:01 +0000 I just started printing "real" objects with my Core One+ and had few issues with the dry box mod but am now having failures with the flat panels for the Skadis mod using a new role of Prusament PETG, the textured build plate, and the default settings in the printer for that filament. 

I initially had this happen which was resolved by cleaning the Prusa textured plate with soap :

I now end up with areas of irregularity on the final surface of the print and occasional large clumps of filament deposited along the way which I have been able to pause and cut off:

I am not clear I found this exact issue in some other posts, and so am not sure if adjusting Z-axis settings or temperatures might be the next best step.  Thank you in advance for any advice!

]]> How do I print this? (Printing help) mvboland https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-petg-clumping-and-irregular-final-surface/#post-781765