A million ways to skin a cat, I pull 1C or so of beer, sprinkle 1/2 a package [~1 teaspoon] on the surface at room temperature, let it stand for a few minutes until the gelatin dissolves, heat to ~150, dump it back in the FV, stir well, purge as best I can the FV with CO2 and stick it in the fridge. Usually works pretty well, sometimes better than others.