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 usually come from excessive oozing or improper retraction settings. Start by reducing your print temperature; TPU typically prints well between 210°C and 230°C, so try lowering the temperature in 5°C increments to see if it helps. Next, adjust your retraction settings: increase retraction distance slightly (around 1-2 mm for direct drive extruders) and speed to reduce filament oozing during travel moves. Also, slow down travel speed to minimise stringing. Ensure your print speed is moderate—around 20-30 mm/s—as TPU is flexible and prints best at lower speeds. Finally, check your filament path for any unnecessary bends or tension that might cause inconsistent extrusion. Cleaning the nozzle regularly can also prevent build-up that leads to stringing. Implement these steps one at a time to identify what works best for your setup.