Mineral deposits from hard water can leave your kitchen utensils looking dingy. To remove those unsightly stains… cork to the rescue! Here’s how to do it: Rinse the cork with hot water to remove wine residue. Then dip its end in 1 tablespoon olive oil and use to scrub spots. The cork’s textured surface acts as a mild abrasive, dislodging buildup without leaving scratches on your utensils. You can also use it to brush the stopper over the edges of knives to displace hard-to-remove food.