Using your Deejo knife is easy. Just open it by pressing the liner lock and use it for various cutting tasks like opening packages or slicing fruits. When closing, make sure to press the liner lock firmly and gently fold the blade back. For safety, always keep your fingers away from the blade when opening and closing. As for maintenance, after each use, wipe the blade with a dry cloth to keep it clean. If it gets wet, dry it immediately to prevent rust. The juniper wood handle is delicate, so avoid soaking it in water. Periodically, you can use a light oil on the blade to keep it in good condition and ensure smooth operation of the liner lock system.