The Picard ManeuverThey don't want you to know
LaserIt might also have to do with the fact that a window is more expensive, but required for ovens and microwaves as food night burn otherwise, but usually there’s no issue running a dishwasher longer than exactly required
It’s definitely not required for ovens. Source: previous oven (1950s vintage) didn’t have one.
Pretty useful, and pretty important on microwaves too.
You can open it but you every time you do, you lose heat, which has to be compensated for by the oven. A window makes the process much easier. There wouldn’t really be measurable gains for a dishwasher
That person has never cooked a souffle.