Invisible hd useage - what gives?

[Tyrannocaster]

I found it, but I can't see it and I can't figure out how to delete it. Poking around the internet, I discovered this command:

sudo du -xh / |grep '^\S*[0-9\.]\+G'|sort -rn [I had to use sudo or it wouldn't run]

and this is the result:

8.8G /root/.local/share/Trash/files/2018-10-02_15-09-58
8.8G /root/.local/share/Trash/files
8.8G /root/.local/share/Trash
8.8G /root/.local/share
8.8G /root/.local
8.8G /root
8.7G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost
4.9G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/usr
4.7G /usr
2.8G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/usr/lib
2.7G /usr/lib
2.3G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/var
2.2G /var
1.7G /home/ben
1.7G /home
1.6G /usr/share
1.6G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/usr/share
1.4G /home/ben/.cache
1.3G /var/cache
1.3G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/var/cache
1.2G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/usr/lib/x86_64-linux-gnu
1.1G /var/cache/apt
1.1G /root/.local/share/Trash/files/2018-10-02_15-09-58/localhost/var/cache/apt

So you were right, there are trash files, only they don't show up in my file manager even though I have it set to view hidden files. Some of these are duplicates, but not all of them.

How do I delete these? (Only the ones in the trash, of course.)

EDIT: I used Krusader in superuser mode to delete these, because it could see them. It worked great. I would have preferred to do this through the terminal, but I am new enough to Linux that I was not confidant I wouldn't mess things up. This did it though.