The pixel cleaning warning turns out to have no native way to disable it, and it’ll always show up after 8 hours of runtime.
Come on, does anyone dog food their own products anymore? How could a single person developing the monitor actually believe consumers want to be bothered with this every day? If the hardware is really so terrible this must happen, find some way to incrementally do it silently or off hours. Anything else.
I have an LG TV with a similar problem. I think it’s supposed to pixel clean when you turn it off, and I do every night.
Yet for some reason I can’t escape these annoying pixel cleaning interruptions. Seems like a bug in the firmware.