It is accurate that if you uhave eaten something, etc etc that would give a false reading without washing your hands. It is generally educated to diabetics
that they wash hands in soap and water ensuring that they are rinsed thouroughly and dried well prior to p r i c k i n g. Great disparity in tests done on separate hands in the same time frame would lead me to check out use by dates and also that your glucometer is correctly callobrated...