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 incorrect print settings or filament handling. Start by lowering your print temperature; TPU typically prints best between 210°C and 230°C. Too high a temperature causes excessive oozing and stringing. Next, increase your retraction distance slightly (try 1–2 mm more) and speed to reduce filament oozing during travel moves. Keep travel speeds high (around 150 mm/s) to minimise stringing. Also, enable combing mode in your slicer to avoid unnecessary travel over open spaces. Make sure your filament is dry, as moisture can cause bubbles and stringing. Finally, slow down your print speed to around 20–30 mm/s for better control and quality. Cleaning the nozzle before printing can help if old residue is causing issues. Following these steps should significantly reduce stringing and improve your TPU print quality.