Using these Jimmy's SmartStix Double Pointed Needles is a breeze. Just start knitting your project as you normally would. The color - coded intervals at one - inch marks are super handy. When you need to measure your work, simply line up the appropriate part of your knitting with the markings on the needle. To check your gauge or wraps per inch, you can use the markings too. As for maintenance, keep the needles in a dry place. Avoid dropping them on hard surfaces as it might damage the tips. If they get dirty, you can gently wipe them with a soft, dry cloth. And that's all there is to it! Enjoy your knitting with these smart needles.