Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Stringing (also called "oozing" or "hairy prints") is one of the most common 3D printing issues. It happens when small strings of filament are left behind as the nozzle moves between parts of the print. Here are the most effective ways to fix it, ranked from most impactful to fine-tuning:

1. Enable/Optimize Retraction Settings (Biggest fix for 95% of cases)

Retraction pulls filament back into the nozzle during travel moves to prevent oozing.

2. Lower Nozzle Temperature (Usually #2 most effective)

Hot filament is more liquid and oozes more.

Print a temp tower to find the lowest temperature that still gives good layer adhesion.

3. Enable or Increase Combing + “Avoid Printed Parts When Traveling”

In Cura:  

Combing → “All” or “Not in Skin”  

Avoid Printed Parts When Traveling → Enabled

This keeps the nozzle inside already-printed areas or over infill instead of jumping across open air.

4. Increase Travel Speed

Faster travel = less time for filament to ooze.Try 120–200 mm/s (or higher if your printer can handle it).

5. Enable “Z-Hop When Retracted” (helps a lot on some printers)

Lifts the nozzle slightly during travel so strings don’t catch on the print.Typical Z-hop height: 0.2–0.5 mm

6. Dry Your Filament

Wet filament boils and oozes dramatically (especially PLA, PETG, Nylon).Stringy prints that suddenly get worse = almost always moisture.Dry at 40–50°C for 4–6 hours (or use a proper filament dryer).

7. Linear Advance / Pressure Advance (Advanced – huge improvement on Klipper/Marlin)

Calibrate K-factor (Klipper) or Linear Advance (Marlin). This eliminates oozing at corners and travels almost completely on capable firmwares.

8. Other Minor Tweaks

Coasting (Cura/PrusaSlicer): Replaces last bit of extrusion with travel (very effective for some materials).

Wipe nozzle while traveling (enable wipe + coasting).

Use “Outer Wall Wipe Distance” (OrcaSlicer/Bambu Studio).