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. TPU is flexible and can ooze easily, so try these steps: first, reduce the print temperature by 5–10°C from the filament manufacturer’s recommendation to minimise oozing. Next, increase retraction distance slightly (e.g., 1–3 mm) and speed, but avoid too high values that can cause filament jams. Lower your print speed to around 20–30 mm/s to improve control. Also, enable combing in your slicer to avoid unnecessary travel moves over open areas. Check that your nozzle is clean and that the filament path is smooth, as TPU can buckle if feeding is inconsistent. Finally, ensure your filament is dry; moisture can cause bubbles and stringing. Dry your filament at 40–50°C for a few hours if needed. These adjustments help reduce stringing and improve print quality with flexible TPU filament.