How to fix stringy and messy TPU 3D prints

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

Answer: Stringy and messy prints with TPU often result from incorrect print settings or filament handling. To improve your print quality, start by lowering the print temperature slightly—try reducing it by 5–10°C to minimise oozing. TPU typically prints well between 210°C and 230°C, but check your filament’s recommended range. Next, increase retraction distance and speed cautiously; TPU is flexible, so too much retraction can cause jams, but too little leads to stringing. A retraction distance of 2–4 mm and speed of 20–30 mm/s is a good starting point. Also, slow down your print speed to around 20–30 mm/s to give the filament time to solidify. Ensure your nozzle is clean and your filament dry, as moisture can cause bubbles and stringing. Finally, enable combing or coasting features in your slicer to reduce unnecessary travel moves and oozing. By fine-tuning these settings step-by-step, your TPU prints will become cleaner and less stringy.