I have two All-Clad pans (8-inch fry pan and 3-qt saute) and both of them have mottled, cloudy surfaces in the pan. I bought them both new at a Williams Sonoma outlet. The started with the saute pan. The first thing I cooked in it was a steak. I didn't make a sauce to go along with it so the burned bits were tough to wash off. I filled it with soap and water and let it sit (I think overnight.) After I cleaned it the surface was all mottled. I thought it was because I let it sit so long so I didn't do that with the fry pan. After using it I washed and dried it right away but I still ended up with the same result. Did it require some sort of seasoning? I didn't get any directions with it because it was open stock and didn't come in a box. Any ideas on what's wrong and ways I can get it looking new again, if possible? TIA!