In the logout screen of Xfce there's a line you can turn on or off which, when turned on, will save your session. This can be impractical and inconvenient. There's a trick to disable this option in the logout screen of Xfce. Below the steps how to disable the safe session option in the logout screen.
Open a terminal
Type the following command (or copy and paste it in the terminal):
sudo mkdir /etc/xdg/xfce4/kiosk
Then type the following command (or copy and paste it in the terminal):
For distro's using gedit:
gksudo gedit /etc/xdg/xfce4/kiosk/kioskrc
For distros' using pluma:
gksudo pluma /etc/xdg/xfce4/kiosk/kioskrc
For distro's using leafpad:
gksudo leafpad /etc/xdg/xfce4/kiosk/kioskrc
In this text file paste the following lines:
[xfce4-session]
SaveSession=NONE
Now save the file and close it.
Now you need to check 1 other option:
Go to Menu > Settings > Settings and Startup
At the first tab, check if the line Automatically save session on logout is unchecked.
If not, uncheck the line
Now reboot your system and log back in.
That's it!