When bringing in a Remote Guest, you do not need to wait for a guest to leave on their own in order to end the chat or to switch them out for a new guest. By refreshing the Chat Room, you can force them to leave your show:
To remove a remote guest:
Go to the Remote Guests page in the Switcher Studio dashboard.
Click the refresh icon next to your Invite Guests URL.
This will remove anyone in the room and changes the room URL.