How to Fix Stringy and Messy TPU 3D Prints

Question: Why is my TPU 3D print stringy and messy?

Answer: TPU is a flexible filament that requires fine-tuning to avoid stringing and messiness. First, lower your print temperature by 5–10°C; TPU usually prints well around 210–230°C, but cooler settings reduce stringing. Next, increase your retraction settings: try increasing retraction distance in small increments (e.g., 1mm at a time) and ensure retraction speed is not too fast to avoid filament grinding. Also, slow down print speed to around 20–30 mm/s for better control. Enable combing or avoid crossing open spaces during travel moves to reduce strings. After printing, clean the nozzle to prevent old filament from causing issues. Finally, ensure your filament is dry, as moisture can cause stringing and blobs. Try these adjustments step-by-step to find the best balance for your specific TPU brand and printer setup.