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 improper retraction settings, nozzle temperature, or print speed. Start by reducing retraction distance and speed, as TPU is flexible and can jam if retracted too aggressively. Try lowering the nozzle temperature by 5–10°C; TPU often prints well between 210°C and 230°C, but too hot causes oozing. Also, slow down your print speed to around 20–30 mm/s to give the filament time to lay down cleanly. Ensure your print cooling fan is on to solidify the filament quickly. Finally, check your filament path for any tight bends or friction points that could cause inconsistent extrusion. Adjusting these settings step-by-step should reduce stringing and improve print quality.

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