heat up some water, add soap, soak a towel in it and use it to clean yourself in the shower then rinse yourself off with the freezing shower water. Oh and wash your hair in the sink.
I did this once and was still miserable but I was clean.
I bit my teeth and went under the cold shower. I hoped it was a bit lukewarm, but nope. It colder the longer I let the water flow. Now my hair looks bearable, but still isn’t really clean. I hope they finally fix that water boiler problem, it’s been going on since the beginning of the week