Just as I thought. I am intolerant to the lactose in milk. I’m not allergic thank goodness, but I am intolerant. Didn’t know there was a difference between intolerant and allergic too but there you go (or rather there I go). I went and bought various grain based milks which I don’t mind but try and make froth with the stuff and rien. Which means no more frothy hot chocolates for yours truly. Oh well, I’ll look on the bright side: I’m only intolerant.