No the sponging happened earlier!
Summer, solar showers, brilliant, winter normal showers on board, 150 gals water, 3.5 litres an hour water maker, for next year, wouldn't be wihtout showers on board.
If I agreed with you we'd both be wrong.
Something we discovered was get a 'trigger shower head' sort of thing that comes up through a work surface for washing off plates. It reduces water used and if required you 'flick' it the otherway for continuous. Standard fitting on big fighting ships and can be had from someone called Penguin Engineering they had big choice