Hi - fairly dumb newbie question, but how do you remove the radio antenna on a 2005 GLS? I can unscrew the little silver nut at the base easily enough, but I'm not sure what else is required - the manual is a bit unclear and maybe indicates you need to also unscrew the antenna itself, but it doesn't seem to want to move. Or should it pull straight out with the nut removed? I don't want to accidentally break something. Thanks a lot.