2% is equivalent to 131 mg/dl daily glucose
average. Sometime during the day your levels
are not OK, or your meter is need of
calibration and/or test strips are not within their expiration period.
"I snack late and may eat nuts, yougurt, or sugar free coffee."
During sleeping hours your liver and body fat releases stored glucose in expectation for the energy you need upon wakening. Bad snacks add to the stored glucose which in turn gets dumped. Make sense?