Using addi Turbo Circular Needles is easy. Just thread your yarn through the needle and start knitting. The smooth nickel coating helps the yarn move freely, so you can work on your project faster. When choosing a needle size, keep in mind that some of the smaller sizes don't follow standard US sizing, so double - check the actual size on the label. As for maintenance, you can wipe the needles with a soft, dry cloth after use to keep them clean. Avoid using harsh chemicals as they may damage the nickel coating. Store the needles in a dry place to prevent rusting or damage to the cords. And be careful with the plastic needle tips of US 36 and US 50 sizes; don't drop them or subject them to excessive force as they may break.