BT Broadband “Cleanzone” (00:40)# Immense efforts are required to make sure the flat is spick-and-span before the parents return from their holiday. If there’s one thing that’s drummed into even small children, it’s that their room is always supposed to be tidy. And if they rebel, they’re in trouble. A sad fact that will continue to haunt them even when they’ve grown up. The student freshman in this spot comes up with a particularly sophisticated idea to placate his parents, though. Just before talking to them via his BT webcam, he simply cleans exactly the area that they’ll be able to see. But if you look closely enough, you’ll notice that his parents have also got something to hide …