Filament stringing—also called oozing or hairy prints—happens when thin strands of filament are left between parts of a print. This occurs because melted plastic leaks from the nozzle during travel moves when it shouldn’t.

Moisture in the filament expands into steam in the nozzle, forcing out extra material. Dry hygroscopic filaments such as PETG, ASA, and Nylon before use. Follow recommended drying temperatures and store in an airtight container with desiccant.
|
Filament Type |
Temp (℃) |
Temp (℉) |
Duration |
|
PLA series |
50 |
122 |
7 hours |
|
PETG series |
65 |
149 |
7 hours |
|
TPU series |
70 |
158 |
7 hours |
|
ABS/ASA |
75 |
167 |
7 hours |
|
PC Professional |
75 |
167 |
7 hours |
|
Easy Nylon |
95 |
203 |
7 hours |
More retraction pulls extra filament out of the nozzle during travel. Increase by 0.5–1 mm at a time until stringing improves. Bowden setups usually require more retraction than Direct Drive printers.
Retracting faster reduces pressure in the nozzle more quickly. Increase retraction speed slightly, and if you notice grinding or jams, lower it slightly.
The hotter filament flows too easily and leaks. Reduce the printing temperature in 5–10 °C steps until stringing is minimized, but ensure layer bonding remains strong.
Faster travel moves mean less time for the filament to ooze. Raise travel speed to 150–200 mm/s if your printer can handle it without vibration or layer shifts.
Enable slicer options like Avoid Crossing Perimeters or Combining to reduce open-air travel paths, limiting chances for oozing.
If the issue persists, please contact us anytime at service@overture3d.com.