How to Fix Stringy and Messy TPU 3D Prints

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

Answer: Stringing and messiness in TPU prints usually result from filament oozing during travel moves. To fix this, first reduce your printing temperature by 5–10°C; TPU typically prints well between 210°C and 230°C, but lower temperatures help reduce stringing. Next, increase your retraction distance slightly (around 2–3mm) and speed (30–45 mm/s) if your printer supports it—this pulls the filament back and prevents oozing. Also, enable combing mode or avoid crossing perimeters during travel moves in your slicer settings to minimise stringing. Slowing down travel speed can help, but don’t go too slow as it may increase oozing. Finally, ensure your filament is dry, as moisture can cause bubbles and stringing. Try these steps one at a time to see what works best for your setup.