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 down to oozing and improper retraction settings. TPU is flexible and can be tricky to print, so try these steps: First, reduce your print temperature by 5–10°C to minimise filament oozing—typically, TPU prints well between 210–230°C, but check your filament specs. Next, increase your retraction distance slightly (start with 1–2 mm) and speed (around 25–40 mm/s) to help pull back filament during travel moves. Also, lower the travel speed to reduce stringing. Make sure your print speed is moderate, around 20–30 mm/s, as TPU doesn’t handle high speeds well. Finally, ensure your nozzle is clean and consider enabling a wipe or coast setting if your slicer supports it. These adjustments should reduce stringing and improve print quality. Remember, small tweaks often make a big difference with flexible filaments.