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 from incorrect retraction settings and printing temperature. TPU is flexible and can ooze easily, so start by lowering your printing temperature to around 210–230°C, depending on your filament brand. Too hot and it becomes runny, causing strings. Next, adjust your retraction: reduce retraction distance and speed to prevent filament grinding or clogging—try 1–2 mm retraction at 20–30 mm/s. Also, slow down your print speed to 20–30 mm/s to give the filament time to cool and reduce stringing. Enable combing mode if your slicer has it, so the nozzle avoids crossing open spaces. Finally, make sure your hotend and nozzle are clean, and check for any moisture in the filament, as damp TPU can cause poor extrusion. Dry your filament if needed by placing it in a food dehydrator or low-heat oven for a few hours. These steps should help eliminate stringing and produce cleaner TPU prints.