Knives with ceramic blades need to be re-sharpened ... A stainless steel knife holds its edge, but it’s difficult to sharpen using home tools. You'll need to take it to a professional sharpener ...

It's considered an investment for a reason. 2. Sharpen knives with a ceramic mug in a pinch. Stroke the blade against the exposed, unpolished ceramic bottom and voilà, your former dull knife ...