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 come down to incorrect print settings or filament handling. Start by lowering your print temperature in 5°C increments—TPU typically prints well between 210°C and 230°C; too hot causes excess oozing. Next, increase retraction distance slightly (around 2–4 mm) and speed to reduce stringing. However, be cautious—too much retraction can cause jams with flexible filament. Also, slow down your print speed to 20–30 mm/s for better control. Make sure your filament is dry, as moisture can cause bubbles and stringing. If your printer allows, enable combing or coasting features to minimise travel moves and oozing. Lastly, clean your nozzle before printing to prevent clogs. By adjusting temperature, retraction, speed, and keeping filament dry, your TPU prints should become much cleaner and less stringy.