Using addi Turbo Circular Needles is easy. Just thread your yarn onto the needle and start knitting as you normally would. The smooth nickel coating will help the yarn slide along effortlessly. When using, be aware of the non - standard sizing of some smaller needle sizes as mentioned. For maintenance, keep the needles clean. You can wipe them with a soft, dry cloth after use. Store them in a safe place to avoid bending the cords or damaging the needle tips. If you're using the plastic tips of US 36 and US 50 needles, handle them gently to prevent scratches.