 You're quite welcome, Chuck. I hope that helps. Yeah, I remember this one time. Geez, I remember this at my dad's house. And he had, it was a mess. It was just a black film, just as Chuck describes it. And I remember turning off the water and flushing the toilet. I reached in and grabbed that flapper. And I'm telling you, I had just, it was like, it was almost like a mush. It was real soft and it was really breaking down. It was degrading. Just change that out and problem resolved.