Personally, I prefer cold water. Run the brush under the faucet for 15 seconds or so. If using cream, did tip of brush in the cream. If using soap, put some cold water over soap while prepping with shave oil, then pick some of that withe the brush.
Musgo Real aftershave is one of my favorites, but there is something about menthol lotions for those muggy summer days. Darn, I miss shaving. Hum.
word of caution: don't do presoaking to tallow based soaps like tabac or be very anal about drying the puck. There are instances where the soap absorbed too much water. Go see related posts on badger and blade.