How to fix stringy and messy TPU 3D prints

Question: Why is my TPU 3D print stringy and messy?

Answer: TPU is a flexible filament that requires fine-tuning to avoid stringing. First, reduce your printing temperature by 5–10°C; TPU typically prints well between 210–230°C, but higher temps can cause stringing. Next, increase your retraction distance and speed slightly in your slicer settings to prevent oozing during travel moves. For example, try a retraction of 1–2 mm at 30–40 mm/s, but test carefully as TPU can jam if retracted too aggressively. Also, slow down travel speed to minimise stringing, aiming for around 150–200 mm/s. Ensure your nozzle is clean and dry filament is used, as moisture can worsen stringing. Lastly, enable combing or avoid crossing perimeters options in your slicer to reduce travel over open spaces. By systematically adjusting these settings, you should see a significant improvement in print quality with less stringing and messiness.