Hey folks! Using this forums generous knowledge, I have been able to clean my Adventurebilt fedora several times over the 13 years I've been wearing it. But this last time has broken me. I know I'm doing something wrong. I tried steam and sponging with naphtha, that didn't help the sweat/grease marks. I tried talcum to soak up the grease, but it just turned the hat white in places. Finally, I dunked it in naphtha completely for hours, and it didn't really do much of anything! Is my hat too far gone? Am I making some rookie mistake? Help me save my lid!