PLA stringing is the fine web of plastic hairs your printer leaves between moves when you run PLA. PLA strings less than PETG because it prints cooler and stiffens fast, but it still strings when the retraction is off, the nozzle runs hot, or the spool is damp. Prusa’s stringing guide traces it to those three.
The fix is a short list, and PLA clears fast because it behaves clean at the right temp. Work the list in order and reprint the same test after each change.
PLA prints cool, near 200 C, so a nozzle set too high is a common cause of the hairs.
What causes it
| Likely cause | Fix | Severity |
|---|---|---|
| Retraction too low | Raise retraction distance a step at a time and reprint after each change. | hi |
| Nozzle too hot | Drop the nozzle toward 200 C, the low end of the PLA range. | md |
| Wet PLA | Dry the spool at 40 to 50 C, then reprint. Wet PLA strings more. | md |
| Travel too slow | Raise travel speed so the nozzle spends less time oozing across gaps. | lo |
| No pressure relief | Turn on wipe while retracting, or coasting in Cura. | lo |
Try these first
Print two thin towers with travel between them, then work top to bottom and reprint after each step.
Raise retraction
Add a little retraction distance and reprint, until the hairs clear.
Drop the nozzle temp
Lower the nozzle toward 200 C and reprint, since cooler PLA oozes less.
Dry the PLA
If the hairs come with a rough surface, dry the spool at 40 to 50 C and reprint.
Raise travel speed
Bump travel speed so the nozzle crosses open gaps faster.
Deeper fixes to try next
When retraction and temp do not clear the hairs, the pressure and the hardware are next.
Turn on pressure relief
Enable wipe while retracting in PrusaSlicer or Bambu Studio, or coasting in Cura.
Tune pressure advance
On Klipper or a printer that supports it, adjust pressure advance to ease filament pressure at the seam.
Check the extruder
A partly clogged nozzle or a loose Bowden coupling causes uneven flow that reads as stringing.
How PLA differs
PLA strings less than PETG because it prints cooler, near 200 C, and stiffens fast after it leaves the nozzle, so it oozes less on travel moves. PETG stays runnier at its higher temp and strings more, and nylon strings the most. A wet PLA spool still strings, but PLA pulls in moisture slower than PETG, so it is less often the cause.
Mistakes that keep PLA stringing
A few choices fight the hairs and cause a new fault.
Avoiddo not
- Cranking retraction so far the PLA under-extrudes.
- Running the nozzle hot to melt the hairs, which makes them worse.
- Skipping the dry step when the surface looks rough.
- Changing retraction, temp, and travel in one pass.
Key takeaways
- PLA strings from low retraction, a hot nozzle, or a damp spool.
- PLA strings less than PETG because it prints cool and stiffens fast.
- Raise retraction, drop the nozzle toward 200 C, and dry the PLA.
- Change one setting and reprint the same test.
For the general version, the stringing guide covers any filament, and the PLA hub covers the material in depth.
Related guides
Related
More in this area
Cross-reference
Sources & methodology
3 citations · reviewed 2026-07-10- 01Prusa Knowledge Base: Stringing and oozing (retraction, temperature, wipe)accessed 2026-07-09Tier 1
- 02Bambu Lab Wiki: Stringing and oozing (retraction, temp, damp filament)accessed 2026-07-09Tier 1
- 03All3DP: Stringing, easy ways to prevent itaccessed 2026-07-09Tier 2