Just so everyone is aware; "goof off" is just xylene that is re-packaged and marketed as a magical cleaning product. So if you want the same thing without the marketing just buy xylene or xylol from the hardware store.
Now if we could just find out what is in '303'...
I run my shore cord down the slip finger (neatly); that way we don't need to coil it and re-string it when we sail. I turn the power off at the dock box before we unplug to be sure it's off while away from the dock.