Please see the following support article for more information about using Guest Mode on your Roku device:https://support.roku.com/article/360015612834-how-do-i-set-up-guest-mode-on-my-roku-streaming-device...
You do not have to factory reset a Roku device to exit Guest Mode—this is done online from your Roku account at my.roku.com
Thanks,
Tanner
Unfortunately, you can't log in to your Roku account when in Guest Mode. I thought I would be able to do this when I tried a few months ago. I wanted to view the Roku Channel premium add-ons on my mom's Roku. I even tried casting the premium channels from my phone's Roku app to the Roku in Guest Mode, but that wouldn't work either.
And yes, I was also unable to sign out of Guest Mode on the Roku. I'd have thought Roku would have fixed this major problem by now. I had to factory reset the unit. At that time, I don't think the Roku had the latest OS required for signing out via the Roku website.
Please see the following support article for more information about using Guest Mode on your Roku device:https://support.roku.com/article/360015612834-how-do-i-set-up-guest-mode-on-my-roku-streaming-device...
You do not have to factory reset a Roku device to exit Guest Mode—this is done online from your Roku account at my.roku.com
Thanks,
Tanner