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, reduce your print temperature; try lowering it in 5°C steps starting around 210°C, as too high a temperature causes excess oozing. Next, increase your retraction distance slightly (around 2-3mm) and speed (30-50mm/s) to prevent filament from leaking during travel moves. Also, enable combing or avoid crossing perimeters in your slicer settings to reduce travel over open areas. Printing slower, at 20-30mm/s, helps control the flexible filament better. Finally, check your filament path for any slack or drag that might cause inconsistent extrusion. Clean the nozzle to ensure smooth flow and consider drying your filament if it’s absorbed moisture, as damp TPU can produce stringing. By adjusting temperature, retraction, speed, and ensuring dry filament, you should see a marked improvement in print quality.