Question: Why is my TPU 3D print stringy and messy?
Answer: TPU is a flexible filament prone to stringing if settings aren’t dialled in. Start by reducing your print temperature by 5–10°C; TPU usually prints well between 210–230°C, but too hot causes oozing. Next, increase retraction distance slightly—try 2–4 mm—and speed to prevent filament leaking during travel moves. Lower travel speed can help reduce stringing as well. Ensure your nozzle and filament path are clean and not clogged. Print slower overall, around 20–30 mm/s, to improve control. Enable combing mode if your slicer has it, so the nozzle avoids crossing open spaces. Finally, check your filament moisture; TPU can absorb water and become stringy. Store it dry or dry it before printing. Adjust these settings step-by-step and test small prints to find the sweet spot for your specific printer and TPU brand.
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