My problem at night is simply that I doze off every now and then, and the dilator pops out on its own and gooses me in the wrong entry way, which wakes me up for sure. Over all nightly fatique of the sort that tells us its beddy bye time is most likely the culprit. I have a friend whose day end is at 6AM, and when she does her bedtime dilation, its a big fat nuisance and does hurt a bit more then.