Wow i remember reading about this several years ago...RIP sometimes i dont bathe for a week or 2 due to water rationing here. But managed to wipe self down. No prob  

..apparently removing the dirt shell made him vulnerable

Shield of grime. Sounds like the name of a metal band, but apparently it's a real thing  

hmn...maybe we've all been doing it wrong the whole time..  

perhaps the 'occasional' sauna & dip in the lake (nature) is the answer afterall..heh

https://longevity.technology/lifestyle/hot-and-cold-the-health-benefits-of-ice-baths-and-saunas/

First problem with that article is 

Saunas are therapeutic, heated (between 150°F and 195°F or 65°C to 90°C)

In Finland anything below 80°C is called a Swedish sauna. (It's derogatory)

Second,

Finnish saunas generally utilise dry heat, while Turkish-style saunas have more moisture.

Umm, no. Löyly, the body of steam spirit that rises from the sauna stones when you throw water on them beg to differ. 

My ideal sauna would be about 100°C with a full moon snowy -15C outdoor setting where you alternate sauna with naked rolling in the snow

throwin water on the hot rocks & the steam therein is where it's at..yeah

 the author of that article is definitely ignorant about finnish saunas

..rolling in the snow is refreshing but a dip in frozen/cold lake adds another dimension altogether

depends on mood or access i suppose

In Finland anything below 80°C is called a Swedish sauna. (It's derogatory)

Posted by: @nightmare

throwin water on the hot rocks & the steam therein is where it's at..yeah

 the author of that article is definitely ignorant about finnish saunas

..rolling in the snow is refreshing but a dip in frozen/cold lake adds another dimension altogether

depends on mood or access i suppose

Not far from my house they have a hot sauna every winter Sunday and a hole chopped out on the ice covered river for anyone who's into it.

I've not done it, but it's very popular.