Using these addi Turbo Circular Needles is a breeze. Just thread your yarn through the cord and start knitting as you normally would. The nickel coating helps the yarn move easily, so you can work quickly. When it comes to sizing, be careful as some of the smaller sizes are different from the standard US sizing, so double - check before you start your project. For maintenance, you can simply wipe the needles with a soft cloth after use to keep them clean. Store them in a dry place to prevent any damage to the cords and needle tips. Since the US 36 and US 50 tips are plastic, handle them gently to avoid breakage.