Blob of material (petg) appearing on/near first layer “randomly” but not constantly - How do I print this? (Printing help) https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4-how-do-i-print-this-printing-help/blob-of-material-petg-appearing-on-near-first-layer-randomly-but-not-constantly/ Prusa3D Forum Discussion Board en-US Mon, 08 Jun 2026 08:18:54 +0000 wpForo 60 Blob of material (petg) appearing on/near first layer “randomly” but not constantly https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4-how-do-i-print-this-printing-help/blob-of-material-petg-appearing-on-near-first-layer-randomly-but-not-constantly/#post-716861 Sat, 20 Jul 2024 22:08:06 +0000 I am seeing a random blob or two of petg material often appear on the first later of a print I have been working on. I am guessing that this might be a moisture issue with the material, however I have only noticed it very early in the print so far. 

What else might cause this?

 

 

The blob is in the top right corner of the full image. You may need to click on it to see it. 

Thanks,

Sean

 

]]> How do I print this? (Printing help) Sean Kane https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4-how-do-i-print-this-printing-help/blob-of-material-petg-appearing-on-near-first-layer-randomly-but-not-constantly/#post-716861