Using these ChiaoGoo Knit RED Circular Needles is easy. Just thread your yarn through the cable and start knitting as you normally would. The smooth red nylon coating on the cable helps the yarn slide smoothly, so you can work on your project with ease. When it comes to maintenance, you can simply wipe the needles with a soft, dry cloth after each use to keep them clean. Avoid using harsh chemicals as they might damage the smooth finish. Also, store the needles in a dry place to prevent rusting. If you're working on a large project, make sure to support the cable properly to avoid tangling. And remember, these needles come in different sizes and lengths, so pick the one that suits your project best.