Person in Zoom meeting asked how to deal with dead pixels on an iMac screen, iMac concerned is 3 years old. She said they were dead pixels & not spots on the screen. One chap suggested massaging it, but I said that was pointless because the display itself is behind glass & won't respond to such manipulation. He agreed & apologised for leading the complainant off on a tangent.
She answered that the first ‘dead pixel’was gone after rubbing it with a moistened microfibre cloth. As it happens, all of the alleged ‘dead pixels’ were stubborn spots on the screen!