Keep your vintage Corningware in good condition by following these cleaning tips:
Using baking soda mixed with water is a good cleaning option. Simply rub gently and rinse thoroughly for sparkling Corningware.
Denture cleaner may also work for cleaning. Simply cover the dish with warm water and drop in two or three denture cleaning tablets.
We recommend do not wash in the dishwasher or use dish soap with lemon. It will fade the design and ruin the finish.
If the piece has gray streaks, it means that the finish is wearing off. There is nothing that can be done for that.