BergHOFF Balance Nonstick Carbon Steel Fluted Cake Pan 10.25"

I was disappointed with this cake pan. After using it only once to bake a cake, it developed a stain/discoloration that will not come off, even after thorough washing according to the care instructions. I expected better durability and quality from a new product. While the pan worked for baking, the permanent stain after a single use is concerning and makes it look old and worn. Unfortunately, this has affected my overall satisfaction with the purchase.