Using these addi Turbo circular needles is easy. First, thread your yarn through the needle tip and start knitting as you normally would. The smooth nickel coating will help the yarn move along effortlessly. When you're done with your project, gently remove the yarn from the needles. As for maintenance, keep the needles in a dry place to prevent the nickel coating from getting damaged. Avoid dropping or bending the needles, especially the smaller sizes. If the cords get tangled, carefully untangle them by hand. Remember, the US 36 and US 50 needle tips are plastic, so handle them with a bit more care to avoid breakage.