Dawn just does not trust her husband.
The harsh chemicals will dull the shine.
If it touches any other metal some *insert technical description I don't know* thing happens and the silverware becomes discoloured. In uneven patches. Found that one out the hard way.
Tupperware made in to 2000's can go in the dishwasher, but not earlier stuff, as it was made with a slightly different plastic. Again, the harsh chemicals do not do nice things to the pretty Tupperware, so leaving it out is still better.
Scraping the plates means the water stays cleaner, therefore cleaner dishes! Especially with rice, that can leave a murky white coat over everything.
Hope these technical explainations help you feel better about the rules!
Those are my rules in my house, my silver is not tarnished, my stainless steel is not rusty, my pots and pans come out clean, as do my glasses and my cutlery....so endeth the lesson......lmao
PS Your wife that made you load the knives pointy side up might have had it in for you...one foul slip into the dishwasher and you would have been a goner!
I will be sure to let him know that he is not alone in the dishwasher bad books!
And to be really annoying, the scraping plates thing is dependant on the dishwasher, in general though if it is expensive, no rinsing is required and it will actually contain dry dishes when the cycle is finished. (I'm on dishwasher number 15, I am an expert).
Everything else- throw it in no pre-rinse required. If it doesn't come clean after round 2 or 3, then bust out the dish soap and scotch brite pad. Tupperware- in it goes. If it comes out messed up- toss it in the trash and deny its existance. Run it when full or if it starts to smell, whichever comes first. Stainless steel stained? WTF?