Because everybody is replying obliquely to this: You should not have to do either of those things. If your dishwasher is working properly, you should be able to put fully-dirty dishes in it and remove fully-clean, dry dishes from it. This is how my dishwasher works and how all dishwashers I have ever owned work.

If your dishwasher does not generally work in this way, it is not working correctly.

My mother had a dishwasher in the late 70's that didn't work properly. I think it was very expensive at the time.

She used it's crumminess as justification both to wash all of the dishes manually, and to never buy another dishwasher again, since she would obviously have to wash all of the dishes by hand anyhow. The thought that technology might improve over time never seemed to occur to her.

I get the idea that she was not alone in that.

No one is "replying obliquely", I don't think. Generally when I post about this, there's a profusion of indignant outrage (usually about how I should use their magic ritual to propitiate the dishwasher), and one or two people also willing to spend the karma points to say that tracks with their experience.

I'm willing to believe commercial-grade dishwashers are actually effective, because only very occasionally do restaurants give me dirty dishes or cutlery. In personal homes, however, I've only encountered totems and superstition, but unlike internet commenters they don't usually get super outraged.