Using these ChiaoGoo double pointed needles is easy. Just start by casting on your stitches as you normally would. Then, divide the stitches evenly among the needles. When knitting, hold the needles firmly but not too tightly to let the yarn move freely. As for maintenance, simply wipe the needles with a soft, dry cloth after each use to keep them clean. Avoid using abrasive materials that could scratch the smooth finish. Store them in a safe place, like a knitting needle case, to prevent bending or damage. Also, keep them away from moisture to avoid rusting. With proper care, these needles will serve you well for many knitting projects.