One could be like the guy with the annual bath; instead of dumping all the sudsy waters down to also wash the cabin floor, one could drink some to encourage a healthy annual purge, too.

The solar shower rarely works in Alaska where cloudy skies persist. Tepid, not quite up to Luke, is a standard. Better than 'snow water melt' if water is clear. Cooked water over a stove, indoors, is nicer than Tepid, Luke or Ice. - In winter, melty snow/ice is as warm as you can make it.

Non-winter outdoors - with aerial attack - make the task more chore than joy. ;)