Two weekends ago, my rear derailer and my windbreaker got in a fight. I'd say it was a draw. Derailer hanger snapped off and windbreaker is "bloody" with an enormous amount of chain grease. I've soaked in in Dawn, nothing, I've scrubbed it with a sponge, nothing. The tag says 100% Polyester. It's wind and rain proof. Any ideas? She cost me a lot of dough and I'd hate to give up on her!

Jeni