Using your Addi Turbo Circular Needles is a breeze. Start by choosing the right size needle for your yarn. Slide the yarn onto the needle and begin your knitting stitches. As the nickel coating helps the yarn glide, you'll find the process very smooth. When it comes to the non - standard sizing, always double - check the actual size before starting your project. For maintenance, keep your needles clean. You can gently wipe them with a soft cloth. Avoid bending the cords too sharply as they're pliable but can get damaged. And since the US 36 and US 50 tips are plastic, be careful not to scratch them.