By „make coffee“ I meant „use the coffee maker as usual, without ground beans but with detergent in the water“. The fume/steam is surely not healthy if inhaled directly and up close, but then again your dishwasher vents those same fumes into your kitchen untreated in much larger quantities than a 200ml coffee maker possibly can.
I regularly use things to clean that I am more worried about, such as bleach, acetone, turpentine and the likes…
I don't know, man.
I don't have a theoretical explanation, especially one that won't be batted away by another theoretical explanation.
I just feel like there's better ways to clean your coffee maker than putting dishwasher detergent/powder/whatever in it and running a coffee making cycle. Sounds like a horrible* idea.
* I should offer a "why" - off the top of my head: if it rinsed out that quick, why does the dishwasher take so long?
Dishwashers don't boil the water, and they anyway use different kinds of detergent specifically designed for the usecase.
Anyway like I said I doubt it's a huge deal. Washing liquid isn't _designed_ to be boiled but I certainly hope the engineers consider the possibility that it might get boiled, and avoid things that would be toxic in that case...