Using these Addi Turbo circular needles is a breeze. Just thread your yarn through the cord and start knitting as you normally would. The smooth nickel coating helps the yarn move easily, so you can work faster. When it comes to smaller needle sizes, double - check the actual size against the label. As for maintenance, keep the needles clean and dry. You can wipe them with a soft cloth after use. Avoid dropping the needles or applying too much force, especially to the plastic tips of the US 36 and US 50 sizes. This will help your needles last a long time and keep your knitting projects going smoothly.