Using the Blue Cube Pocket 15+ is a breeze. Just open the innovative closing mechanism and slide your cards in. You can use it for cube drafting by filling it up like a booster pack, or keep your sideboard cards organized. It's also great for storing tokens or sorting cards in your board game boxes. When you're done, close it securely with the locking mechanism. As for maintenance, keep it away from sharp objects that could damage the inside. You can wipe it clean with a soft, dry cloth if it gets dirty. Be careful when inserting and removing cards to avoid bending them. Enjoy using your card holder to keep your cards safe and organized!