Pitting on the bottom inside of your cookwar can happen for a number of reasons:
1. From cooking acidic foods such as tomatoes
2. From cleaning with oven cleaner
3. From contact with metal utensils
It is worth mentioning that you should never use oven cleaner to clean burned off food from your cookware as it has a pretty harsh affect on stainless steel, especially the polished outside and the copper bottom, and will likely cause pits.
The pits on the inside of your cookware may make food more likely to stick, but other than that shouldn’t be of concern, aren’t a health risk, and pose minimal risk to your cookware, as the finish on stainless steel is self-healing from exposure to heat and oxygen.
Posted in: Damaged Cookware