In my startup days, we were working on a proof of concept with a really big bank. Because of their security rules, we couldn't have direct access to their systems - so if we wanted to do something remotely, we would have to start a webex, they would join and share their screen, and give us remote control.
This worked great, except if we wanted to work over the weekend, since if we left the screen alone for more than a few minutes, the screen lock would kick in and we'd lose the session.
Our solution? We purchased a small fan with an oscillation mode, and tied a mouse to it. We then had the fan drag the mouse ever so slightly back and forth whenever we wanted to step away from the remote session. Kept it going for weeks.