Using your addi Turbo Circular Needles is a breeze. Just thread your yarn through the cord and start knitting. The nickel coating helps the yarn glide, so you can work faster. When using, be aware of the non - standard sizing for smaller needles as described. As for maintenance, keep them clean by gently wiping with a soft cloth. Avoid bending the cords too harshly to keep them flexible. And since the US 36 and US 50 tips are plastic, handle them carefully to prevent scratches.