Using these ChiaoGoo Knit RED Circular Needles is a breeze. First, choose the right size and length based on your project. Then, thread your yarn through the cable and start knitting as you normally would. The smooth surface of the needles and cable allows the yarn to move freely, making your knitting go faster. When you're done, simply unthread the yarn. As for maintenance, keep the needles clean and dry. You can use a soft cloth to wipe them down if they get dirty. Avoid bending the cable too sharply to prevent damage. Store them in a cool, dry place to maintain their quality.