Re: cleaning waders
I agree with Griff, it's probably there for good. My first pair of lightweights will always be my favorite pair because I had stuff all over them. Even when they were dry they looked like I just stepped out of the water. Unfortunately, I would have better results wearing a mesh bag to keep me dry so I don't wear them anymore. Just consider the spot the floatant left as a character mark.
May you fish more than you wish for.