Our Big Horn bathroom door also squeaks. I have not taken the time to fix it, but have looked at it. The hinges squeak do to alignment issues. None of the hinges are perpendicular to the door and jam. The binding is a great part of the cause. Eventually I am going to remove one at a time, drill out the mounting holes, glue in dowels, and drill new pilot holes to remount the hinges properly. So check the alignment of the door hinges.