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 come from incorrect retraction settings, print temperature, or print speed. Start by lowering your print temperature in 5°C increments; TPU typically prints well between 210°C and 230°C. Too hot, and the filament becomes overly runny, causing strings. Next, adjust retraction settings carefully: TPU is flexible and can jam if retraction is too high or too fast. Try reducing retraction distance to around 1-2 mm and slow down retraction speed to about 20-30 mm/s. Also, print slower overall — around 20-30 mm/s helps prevent stringing and improves print quality. Finally, enable combing or avoid crossing perimeters in your slicer to reduce travel moves that cause stringing. Clean your nozzle regularly, as residue can worsen stringing. Following these steps should significantly reduce stringing and give you cleaner TPU prints.