No scientific proof at all but it feels like washing powder does a much better job at removing stains than washing liquid.
It also seems more and more difficult to find washing powder in store as manufacturers are moving to liquid and even more a rip off - pods. Don’t get me started on these money spinners.
What is your experience and what works best?
You’re missing at least 2/3rds, if not more, of his dishwasher saga. He addresses and validates people’s poor results, providing possible reasons for the differences including water quality, detergent quality, etc.
But no, he’s definitely full of BS. /s
It’s been a while but IIRC he says “turn up the heat that’s most important” but it really isn’t.