Hi, so I have this interesting theoretical question. Consider scenario: A hot sauna. The heat source is a number of stones which take heat from a chimney which takes heat from a burning wood. Periodically you pour some water on the stones to create some steam. This, of course, cools down the stones, as the water is colder than the stones. Ideally, you want the sauna heat to last as long as possible and still make some steam. Now the question: what would be better - pouring down the water on one single stone at a time, or spreading it across all of them? And by better I mean keeping the sauna heat as long as possible. I'll leave my own thoughts out for now, I really want some scientific approach to this :) Thanks!