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. Start by reducing the printing temperature; TPU typically prints well between 210–230°C, but too high a temperature causes oozing and stringing. Lower the temperature in 5°C steps to find the sweet spot. Next, increase retraction settings slightly—start with 1–2 mm retraction at a moderate speed (20–30 mm/s) to reduce filament oozing during travel moves. Also, slow down your print speed to around 20–30 mm/s since TPU is flexible and can’t be pushed fast without issues. Make sure your filament is dry; TPU absorbs moisture, which can cause bubbles and stringing. Store it in a sealed container with desiccant. Lastly, check your travel movements to minimise unnecessary travel across open spaces, reducing stringing chances. Adjusting these settings step-by-step should clean up your TPU prints significantly.