We call a "strip wash" a sponge bath, nienna.
More and more public rest rooms seem to be changing over to wall-mounted, automated units where you put your hands into the opening and the soap, then warm water, and then warm air is discharged at intervals.
Ack! I'd hate that. My skin can't stand soap very often, so I only use soap when there's something obnoxious and oily on my skin. If I used soap every time I rinsed my hands, my hands would be cracked and bleeding!
I never wait for the tap to warm up before rinsing my hands, so the mixer valve really doesn't matter for hand washing for me. A quick splash and I'm done. Germs don't worry me much. My cells outnumber them, and are mean fighters!
Most people don't leave their water heaters turned up all the way to 140, vison. Up until last year I kept ours at 125 all the time as an energy saver. When I was washing raw wool fleeces last year, I turned the heater all the way up (and forgot to turn it back) , so I assume it's still near 140 now.
We put in an on demand electric water heater in series with our tank water heater years ago, with the thought of using the tank water heater to heat the water part way, and then the on demand heater to heat it up the rest of the way. It didn't work very well. The on demand heater couldn't heat up the water fast enough to keep up with the demand for one shower, and plus, when we got our first electric bill after the experiment started-- our bill was significantly higher.
So, we eventually turned off the on demand heater and it still sits in series with the tank heater- useless.
It was quite a waste of time and money.