Today, I washed my hands at the kitchen sink while making lunch, and was unexpectedly chastised by my partner because she had just started the dishwasher. Apparently, she has recently come across something that has convinced her that running the hot water in your sink means the water that enters your dishwasher will be hotter (checks out), and thus the dishes will be cleaner. I tried searching startpage to see if this is real, but I couldn’t make it through even one llm-slop-ticle about it before my eyes rolled back into my head, so here I am asking y’all: chat, is this real? Doesn’t my dishwasher have a heating element? Is there any meaningful difference between heating the water with a hot water heater vs a dishwasher, other than I can’t use my sink while the dishwasher is filling and I have to pour a bunch of cool water down the drain?


It’s just to get the hot water flowing in the hot water line. So your dishwasher doesn’t get as much cold water as it would other wise.
The manifold they’re referencing is probably closer to the water heater than the sink. More specifically, it’s probably in their basement or garage. It’s unlikely that running hot water from anywhere will clear those lines.
@DarrinBrunner@lemmy.world, if it begins to bother you too much, do what we did at my friend’s house and turn off the dishwasher supply valve and install a splitter at the sink’s hot water supply valve. I’m obviously making numerous assumptions on how close your dishwasher is to the sink and how accessible everything is.