Using the addi Turbo Circular Needles is easy. Simply thread your yarn onto the needle and start knitting. The smooth nickel coating allows the yarn to glide, so you can work through your projects faster. When using, be aware of the non - standard sizing for some of the smaller needle sizes as mentioned. To maintain these needles, keep them clean and dry. Avoid bending the cords too sharply to ensure their flexibility. If the needles get dirty, you can gently wipe them with a soft cloth. Also, store them in a safe place to prevent the needle tips from getting damaged.