In my experience, doing 3-6 reps is the sweet spot for this type of training. As this is done in a circuit fashion with incomplete rest, you'll be unable to perform the same loads as during traditional lifting sessions.
The water on your body changes to a gas called water vapor. Water turns into a gas through a process called evaporation. Heat makes water evaporate faster. All air has some water vapor. Tropical rain forests and deserts are both hot.
Hot water will certainly evaporate faster, and produce a lot more condensation than cold water, and that's what we are seeing here. The water itself is not freezing, it's the evaporation (the steam) that is condensing and then freezing. So boiling water will produce more ice fog than cold water.