Using these ChiaoGoo Knit RED Circular Needles is easy. First, choose the right size and length for your project. Start by threading your yarn onto the needle and begin your knitting stitches. When knitting, the smooth nylon - coated cable will help the yarn slide smoothly, making your work quicker and more enjoyable. As for maintenance, keep your needles clean by wiping them with a soft, dry cloth after each use. Avoid bending the cable or needles as they're made of stainless steel but can still be damaged with excessive force. Store them in a dry place to prevent rust. If you notice any signs of wear on the nylon coating, it might be time to replace the needle to ensure a consistent knitting experience.