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 usually result from incorrect retraction settings, printing temperature, or print speed. TPU is flexible and can easily ooze during travel moves. To improve your print quality, try the following steps: First, reduce your printing temperature by 5–10°C to minimise oozing—typical TPU prints well between 210°C and 230°C. Next, adjust retraction settings: increase retraction distance slightly (e.g., 1–3 mm) and speed (20–40 mm/s), but be cautious as too aggressive retraction can cause jams. Lower your print speed to around 20–30 mm/s to give the filament time to extrude properly. Also, enable combing or avoid crossing perimeters in your slicer to reduce stringing. Finally, check your filament for moisture; TPU absorbs water which worsens stringing—dry your filament if needed. These adjustments usually reduce stringing and produce cleaner TPU prints.