Cramps waking you up in the night are common (or a few hours later at the meeting when I suddenly can't get out of that chair). I've never tried the cold treatment - next time! Vinegar, too... (maybe that's what was behind the "Jogging in a Jug" product that was basically vinegar - and the only thing that *ever* went unconsumed on our school's faculty "open foraging" table where we brought food to share and sometimes cooking mistakes...)