I find the dish detergent hypothesis more compelling than I used to - before moving to Australia. Here, I've noticed that almost nobody rinses the dishes after washing them (something I have always done). Curious what others do in different locations/cultures. Seems pretty obvious that consuming surfactants, triclosan, phthalates, alkaline agents, synthetic fragrances and dyes is not a great gut health strategy.
Not food but we definitely grew up in Australia with drinks that tasted a little of detergent from a generation of families that never had a dishwasher.
Far less common now as dishwashers became cheaper and more ubiquitous.