Using these Katrinkles stitch markers is easy. When you're working on a knitting project and need to make a note, just grab a Sharpie and write on the marker. This could be details about needle size, stitch count, or any other important info. The ink will stay put until you're done with that note. When you're ready to use the marker again, soak it in some rubbing alcohol. This will clean off the ink so you can write new notes. Remember to use a proper - tip Sharpie for clear writing. Also, don't use harsh chemicals other than rubbing alcohol to clean the markers as it might damage the acrylic. Keep them in a dry place when not in use to maintain their quality.