This Review Title is Product cannot be sharpened after initial use. and the content is: Once you use it to the wood, it cannot be sharpened. The gel turns to mush.  I tried pencil sharpener, Emory board, exacto knife, freezer-first, etc. If you figure it out post the answer..There are other information for this review, one is This reviewer did purchase it and the other is 3 people think this review is helpful.