Hey guys, so I've had a cast iron pan for a while. I love it. However, there's just a black... coating? that just won't go away. I've tried washing it off with hot water and soap and then reseasoning it again... but it always has this black gunk that seems to come off when i clean it with salt at the end of a cook. Because of this, I've always been afraid to make gravy or do anything that requires a lot of liquid or deglazing the pan.
Is this normal?