Using these addi Turbo Circular Needles is easy. Just thread your yarn through the cord and start knitting as you normally would. The smooth nickel coating helps the yarn glide, so you can work quickly. When using, be aware of the non - standard sizing for some smaller needles as described. For maintenance, keep the needles clean and dry. You can gently wipe them with a soft cloth. Avoid bending the cords too harshly to keep them flexible. If the plastic needle tips get dirty, you can wash them with mild soap and water and dry them thoroughly.