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 result from incorrect retraction settings, print temperature, or print speed. Start by reducing your retraction distance and speed—TPU is flexible and can jam if retraction is too aggressive. Try lowering retraction distance to around 1–2 mm and speed to 15–20 mm/s. Next, check your print temperature; TPU typically prints well between 210°C and 230°C. If too hot, it can ooze and create strings, so try lowering the temperature in 5°C increments. Also, slow down your print speed to 20–30 mm/s to give the filament time to deposit cleanly. Finally, ensure your nozzle is clean and your filament dry, as moisture can cause stringing. Adjusting these settings step-by-step should help reduce stringing and improve print quality.