Using addi Turbo Circular Needles is easy. First, thread your yarn onto the needle, and start knitting as you normally would. The smooth nickel coating helps the yarn glide easily, so you can work quickly. When using, be aware that some of the smaller needle sizes are not standard US sizing, so double - check before you start your project. As for maintenance, simply wipe the needles with a soft cloth after use to keep them clean. Avoid using harsh chemicals that could damage the nickel coating. Store your needles in a dry place to prevent rusting or damage to the cords. Also, handle the plastic tips of US 36 and US 50 gently to avoid breakage.