The pans are not stained or discolored on the inside of the pan where the food goes. I clean and rinse them well immediately after use. Obviously, I am not thorough enough on cleaning the outside and bottom of the pans because that's were the burnt on grease is. I guess I don't clean it all off and then the next time I use the pan it burns the grease on the bottom of the pan. I could leave them like that, as it doesn't effect the cooking, but I want them to look a little nicer.
It's very hard to find the Dawn Power Dissolver. There are posts all over the internet of people complaining that they can't find it. I wanted to buy just one bottle to be sure it did what I wanted it to do before I bought 6 bottles, so I did find single bottles on Amazon, and also ordered some BKF with it.
I like these pans. Also, I am too cheap to buy new ones. They cook fine and I will live with the grease burned onto the outside if necessary.