Tried searching, but probably didn't use the right keywords. What's the best way to clean out steel fuel lines? The tank was full of crud, I'm sure the fuel lines are too. Just not sure how to clean 'em. Can I cap it, fill it with seafoam or fuel injector cleaner and let it soak? Flush it with something else? Someone suggested "flossing" it with weed wacker cord. Seemed clever, but I couldn't get the cord very far up the line before it binds. What's the best way? Thanks guys!