Using your addi Turbo Circular Needles is easy. Start by choosing the right needle size for your yarn. Slide the yarn onto the needle and begin knitting as you normally would. The nickel coating helps the yarn move smoothly, so just enjoy the process and watch your project come to life. As for the sizing, double - check the actual size against the label, especially for smaller needles. When it comes to maintenance, keep your needles clean. You can gently wipe them with a soft cloth after use. Store them in a dry place to prevent any damage to the cords or the needle tips. And don't worry about the plastic tips of US 36 and US 50 needles; they're durable and add a bit of sparkle to your knitting.