Using these sleeves is easy. Just gently slide your cards into the sleeves one by one. Make sure to align the card properly to avoid any creases. When shuffling, the smooth texture of the sleeves will make it a breeze. As for maintenance, keep them in a cool and dry place to prevent warping. Avoid exposing them to direct sunlight for long periods as it might fade the color. If they get dirty, you can use a soft, dry cloth to wipe them clean. And always handle the sleeves with clean hands to keep them in good condition.