How to fix stringy and messy TPU 3D prints

Question: Why is my TPU 3D print stringy and messy?

Answer: Stringy, messy prints with TPU usually result from improper print settings and filament handling. TPU is flexible and can cause oozing if retraction and temperature aren’t dialled in. First, reduce your print temperature by 5–10°C from the manufacturer’s recommendation; TPU often prints well between 210–230°C. Next, increase retraction distance slightly (try 2–4 mm) and speed (around 30–40 mm/s) to help reduce stringing. Also, slow down your print speed to 20–30 mm/s for better control. Ensure your nozzle is clean and that the filament is dry, as moisture can cause bubbles and stringing. Finally, enable combing or coasting features in your slicer to minimise travel moves and oozing. Test these changes one at a time to find the best combination for your printer and filament. With these tweaks, your TPU prints should become cleaner and less stringy.