Eyeliner Sharpener?

An ordinary Pencil sharpener will work though a few years back i got a specific make-up pencil sharpener (for thin & thick pencils) by Barry M at a beauty therapy trade show go in to boots or superdrug and check out the make-up sundries section (sponges puffs nail files etc) and you can get an own brand sharpener for about �2 unlike a regular sharpener they'll come with a tool to remove the make-up gunk from the blade