Your knives are never sharp? Typically the problem with knives isn’t that they’re not sharp — it’s that they’re not straight. You can easily straighten your knife with the bottom of a ceramic bowl or cup, running the blade against the rough portion to straighten it. Take care of your knives, too — straighten regularly, bring to a sharpener every six months or so, and don’t store them directly in a drawer (use a knife block or magnetic strip, or buy knife guards).