Using these addi Turbo circular needles is a breeze. Just thread your yarn through the needle and start knitting as you normally would. The smooth nickel coating will help the yarn move easily. When you're done with your project, simply remove the yarn from the needles. As for maintenance, keep them in a dry place to prevent the nickel coating from getting damaged. Avoid using them with overly rough or abrasive yarns that could scratch the coating. Remember, the smaller sizes have non - standard US sizing, so double - check your pattern requirements. And since the US 36 and US 50 tips are plastic, handle them gently to avoid breakage.