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 lowering your print temperature in 5°C steps; TPU typically prints best between 210°C and 230°C, but too hot causes stringing. Next, increase retraction distance and speed cautiously—try 2-4mm retraction at 25-40mm/s to reduce oozing, but avoid too high values as TPU is flexible and can jam. Additionally, slow down print speed to around 20-30mm/s for better control. Check your filament is dry, as moisture leads to bubbles and stringing—dry it in a filament dryer or oven at 40-50°C if needed. Lastly, enable combing or coasting features in your slicer to minimise travel moves with extrusion. Clean your nozzle regularly to prevent build-up that worsens stringing. Following these steps should help you achieve cleaner TPU prints with less stringing and mess.