I'd always start out with lukewarm water, I'm pretty sure all the freezer helps out with is making the acetaminophen fall to the bottom anyway. easiest is to also use a mason jar while shaking so that you can guarentee no spillage unless you have actual beakers and a magnetic stirrer.
@Cgunshow:
Not quite the day I was hoping for yesterday. The future looks bright things will work themselves out but holy shit…. Not again. I hope everyone’s week started much better than mine did take care be vigilant, and have a blessed week