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 retraction settings and print temperature. Start by lowering your print temperature to around 210–230°C, as TPU can become too runny if too hot. Next, reduce retraction distance and speed since TPU is flexible and can jam if retracted too aggressively—try 1–3 mm retraction at slower speeds (10–20 mm/s). Also, check your print speed; slowing down to 15–30 mm/s can improve print quality. Make sure your nozzle is clean and your filament dry, as moisture can cause stringing. Lastly, enable combing or coasting features in your slicer if available, which help reduce unnecessary nozzle travel and oozing. Adjust these settings step-by-step and run small test prints until you find the right balance for your machine and filament brand.