Blobs and zits (bumps on the surface)
Small bumps or pimples appear on walls, often along the seam or where the layer starts and ends.
Quick fix blobs zits bumps seam random blobs
Likely causes
- Seam placed randomly or in a visible spot
- Excess pressure in the nozzle at the start of each layer
- Wet filament popping
- Retraction/prime mismatch
How to fix it
- Set the seam to "aligned" or "rear" so all layer starts hide in one line.
- Enable pressure advance / linear advance to smooth pressure changes.
- Dry the filament; popping and spitting are classic wet-filament signs.
- Slightly reduce flow and increase retraction prime speed.
Work through it in order
The fastest path to a fix
Change one thing at a time and print a small test. Start with the first fix listed — it is the most common cause.