To use these sleeves, simply slide your cards into them one by one. It's easy and helps protect your cards. When handling them, be gentle to avoid any tears. For maintenance, keep them in a dry and cool place. If they get dirty, you can use a soft, dry cloth to gently wipe them clean. Don't expose them to direct sunlight for a long time as it might affect the color and quality. Enjoy using these sleeves to enhance your card - playing experience!