A neighbor during my childhood . . .
. . . had this model Hot Point dishwasher -- or one very close to it. You load it, shut and latch the door, mash the button . . . and that's it.
On the one I remember and used, the upper rack did not slide out on its own. It simply sat on top of the lower rack. You remove the upper rack and set it on the drainboard of the electric sink, load the glasses, etc in it, then place it back on the lower rack.
The neighbor would set the minute timer on her Hot Point stove for 20 minutes. When the timer buzzed, she would open the dishwasher so the dishes would air dry and not use so much expensive electricity.
If the water was HOT, it would do a pretty good job.
Jerry Gay