Using your addi Turbo Circular Needles is easy. Just thread your yarn through the cord and start knitting as you normally would. The smooth nickel coating allows the yarn to move freely, so you can work quickly. When using, be aware of the non - standard sizing for some smaller needles as mentioned. Also, since the US 36 and US 50 tips are plastic, handle them gently to avoid breakage. For maintenance, keep the needles clean. You can use a soft cloth to wipe off any dirt or lint. Store them in a dry place to prevent rusting on the metal parts and damage to the plastic tips. With proper care, these needles will serve you well for many knitting projects.