One of our many petty arguments had to do with putting knives in the dishwasher. One of us thought the blades should be up, and the other thought they should be down. It's obvious which way will result in cleaner knives, isn't it? That isn't a disagreement I have with my husband, but I was reminded of it recently when I read an article by Alisa Bowman on her Project Happily Ever After blog. She suggested running a simple test, a solution that didn't occur to me or my roommate years ago, and one that seems to occur to very few people now.
So I tried it. I coated the blades of two table knives in cream cheese. I put them into the dishwasher, one with the blade up, one with the blade down. Then I processed a full load of dishes with the settings I normally use.
Not only did I confirm that the knives will be equally clean no matter which way we turn them, but I learned that this old dishwasher is more effective than I imagined. No more pre-rinsing!
Of course, there is always the chance that you might not be right after all. Try to take it calmly.