I haven't had to use the heater trick, but a few months ago while the water was out in my building and I woke up incredibly thirsty, I did realize that I could

I haven't had to use the heater trick, but a few months ago while the water was out in my building and I woke up incredibly thirsty, I did realize that I could scoop the ice out of the icetray in my freezer (it has an icemaker, so there is always ice in it), microwave it to melt it, then drink it.