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 come from incorrect retraction settings, temperature, or print speed. Start by reducing retraction distance and speed, as TPU is flexible and can stretch during retraction, causing strings. Try disabling retraction altogether if problems persist. Next, check your print temperature; TPU typically prints well between 210–230°C. Printing too hot causes oozing and stringing, so try lowering the temperature in 5°C increments. Also, slow down your print speed to around 20–30 mm/s to give the filament time to cool and prevent stringing. Finally, enable combing or coasting features in your slicer to reduce travel moves and pressure build-up in the nozzle. Cleaning the nozzle and using a filament dryer can help if moisture is an issue. Adjust these settings step-by-step and run small test prints until you find the right balance for your specific TPU brand and printer setup.