When we moved 5 years ago, my Corelle dishes were all white. However, after time using the dishwasher that was in the house, my dishes have turned dingy gray, especially on the bottom and around the edges. I've tried baking soda (that worked on my glasses) to no avail. Today, while hand washing them I thought 'let's see what vinegar does. So I poured some in a dishpan and put some bowls in - and lo and behold - they came out white.
