Using these ChiaoGoo Knit RED Circular Needles is a breeze. First, select the right size and length for your project. Thread your yarn through the cable and start knitting as you normally would. The smooth surface of the needles makes it easy for the yarn to slide, so you can work quickly and efficiently. When you're done knitting, simply remove the yarn from the needles. As for maintenance, avoid using abrasive cleaners on the needles. You can wipe them down with a soft, dry cloth to keep them clean. Store the needles in a dry place to prevent rusting. If you notice any damage to the cable or the tips, it's best to replace the needles to ensure a good knitting experience.