Using your addi Turbo Circular Needles is super easy. First, pick your desired yarn and thread it through the needle. Start knitting as you normally would, and enjoy how smoothly the yarn moves along the nickel - coated needles. When it comes to the different sizing, double - check the actual size as some of the smaller ones don't follow standard US sizing. As for maintenance, keep the needles clean and dry. Avoid bending the cords too much to keep them flexible. If the plastic tips get dirty, you can gently wipe them with a soft cloth. Happy knitting!