Using your Deejo knife is easy. To open it, simply use your thumb to push the blade out until the liner lock clicks into place. When you're done, press the liner lock and fold the blade back in. Make sure to keep your fingers away from the blade's edge when opening and closing. As for maintenance, wipe the blade clean after each use with a dry cloth. If it gets dirty, you can use a mild soap and water, but dry it thoroughly to prevent rust. Store your knife in a dry place, and avoid exposing it to extreme temperatures or moisture. The juniper wood handle is beautiful but can be sensitive, so don't soak it in water. With proper care, your Deejo knife will serve you well for a long time.