I had the same thing happen to me with a company issued HP laptop years ago. There were like a dozen of us in a meeting at the time and it blew our minds lol It was basically this: https://www.youtube.com/watch?v=0Goz0PnhEg8.

Ha, exactly the same here! It's really annoying if you want to wipe away some dust and the computer/phone reacts to that.