I recently purchased a SS All Clad 1.5 Qt saucepan. I washed it after purchase, and for my first use, I reheated soup (from fridge to simmer). It was a lentil/veggie soup with some lemon. I used low-medium heat. After the first use my saucepan is completely discolored - all splotchy blue!
This is not my first All Clad or SS pan, and my other pans do not look like this. I've useD my AC SS skillet over much higher heat and it is not discolored. Why did this happen? I REALLY don't think I overheated the pan..... could it have been related to to the soup? Could the pan actually be defective?