On a Ubuntu 18.04 LTS machine, some settings related to the theme turned everything in the GUI (xfce) unreadable. I logged out, logged in as another user, deleted that previous user's directory and recreated it as an empty directory, like
rm -r /home/user mkdir /home/user chown user.user /home/user
When I logged back in as 'user', some of the theme settings were somehow still there. Where are these being stored if not in the user's home directory? How can I get rid of them to give a user a completely fresh start?