Using these ChiaoGoo double pointed needles is a breeze. Start by choosing the right yarn for your project. Slide the yarn onto the needle tip and begin knitting as you normally would. When working in the round, use multiple needles to create a circular shape. Remember to keep your stitches evenly spaced for a uniform look. As for maintenance, 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 satin - sheen finish. Store the needles in a safe place to prevent bending or dulling of the tips. These needles are strong, but try not to force them through overly thick or stubborn yarn to avoid any potential breakage.