I bought an brand new All-Clad copper for fry pan from a reputable ebay seller. I saved about 30 bucks, so I figured it was legit and not too good to be true. Well, the copper ring started chipping/fading after washing the fry pan by hand just once. Is this normal or do I have a fake pan on my hands? It's heavy, looks just like the ones I've seen in stores, and it heats extremely evenly.