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PETG stringing: fix it in the right order

Symptom: Fine hairs or thick strings between separate parts of the print.

Most likely causes

  • Wet PETG
  • Nozzle temperature too high for the brand
  • Travel moves crossing open space
  • Retraction not calibrated

Test in this order

  1. Dry the spool and repeat the same small stringing test.
  2. Reduce nozzle temperature by 5°C while checking layer bonding.
  3. Increase travel speed within your printer limits.
  4. Tune retraction in small steps; direct drive usually needs less distance than Bowden.
Stop changing multiple settings at once. Save the model, filament condition and room conditions, then change one variable and compare.

Relevant starting profiles

PETG settingsChoose your printer for a hardware-aware profile

Reviewed 2026-07-22. Results vary by filament formulation, moisture, nozzle and slicer.