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 often result from incorrect retraction settings, too high print temperature, or printing speed issues. To improve your print quality, try these steps: 1) Lower your nozzle temperature by 5-10°C; TPU typically prints well between 210-230°C depending on the brand. 2) Adjust retraction settings carefully—reduce retraction distance and speed since TPU is flexible and can jam if retracted too aggressively. Start with a retraction distance around 1-2 mm and speed of 20-30 mm/s. 3) Slow down your print speed to 20-30 mm/s to give the filament time to extrude cleanly. 4) Enable combing or coasting features in your slicer to reduce stringing. 5) Make sure your filament spool can unwind freely to prevent inconsistent extrusion. Following these tips should reduce stringing and give your TPU prints a cleaner finish.