The last bad low did get frustrating after 4 hours, 80 carbs and at 3AM in the morning.
However the upshot was my T1 told me that next time, just do a mini-glucagon (15 u) if the first attempt at a nighttime low does not fix the problem.
Apparently, drinking cup after cup of juice while trying to sleep does not lend itself to a restful night sleep.
Most of the time for a nighttime low, all it takes is 1/2 cup of juice and we are good to go. But every now and then - doing exactly the same thing you did the last 10 times now produces an entirely different result like it is a different person in front of you.
That would be an expensive practice for us: $200 a pop
For us, the hardest lows to deal with are post-exercise lows, as well, of course, as maladjusted basal issues when exercise regimen has suddenly gone down a lot but we have not adjusted basal, or on the way out of a sickness.
Realistically something this persistent has probably only happened a couple times over the past year.
Normally a drifting low at night is easily correctable with juice.
For 2 hours of exercise, a minimum of 6 grams of carbs per kg of body weight for the day.
(for athletes in general training, not necessarily for occasional exercise)
And following exercise, 1-1.2 grams of carbs per kg of body weight within the first few hours.