Stringing usually comes from hot plastic oozing while the nozzle travels. Learn how to tune retraction distance and speed, temperature, wipe/deretraction, and

E-steps tell your printer how much filament to push per millimeter of commanded extrusion. Calibrate them by measuring real filament movement, updating E-steps,

The best TPU for flexible parts depends mainly on Shore hardness, then on print tuning for retraction, temperature, speed, and cooling. Here’s a practical