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 move freely, so you can work quickly. When using, be aware of the non - standard sizing of some smaller needles as described. For maintenance, keep the needles clean and dry. You can use a soft cloth to wipe them after each use. Avoid dropping the needles to prevent damage, especially the plastic tips of the US 36 and US 50 sizes. Store them in a dry place to keep them in good condition for your next knitting project.