Using your addi Turbo Circular Needles is a breeze. Start by threading your yarn onto the needle. The nickel coating helps the yarn glide easily, so you can work through your knitting project quickly. When using the needles, be aware of the non - standard sizing for some smaller needle sizes as described. This will ensure you get the right stitch size for your project. As for maintenance, gently wipe the needles with a soft cloth after each use to keep them clean. Avoid using harsh chemicals on the nickel coating. When storing, keep the needles in a dry place, and you can use a knitting needle case to protect them from damage. The plastic tips on the US 36 and US 50 needles are durable, but try not to expose them to sharp objects to prevent scratches.