To take care of a fixed blade knife, you need to clean, dry, and oil it regularly. This is very important for high-carbon steel like Cryo D2, which can rust if not cared for. After using the knife, clean it with mild soap and water, dry it thoroughly, and apply a thin layer of oil to the blade.You can sharpen it with a whetstone, ceramic rod, or a sharpening tool. Try to keep the same angle as the original edge, and sharpen it before it gets too dull. With good care, a fixed blade knife can last a lifetime and work like new.