CAH, I have noticed when I have trouble getting enough blood and it takes a while to get it onto the strip that my readings are always low. I always do it again and make sure I have plenty of blood and the reading is usually 1.5-2.0 higher than the original one. This happens mostly in the mornings when my hands are a bit cold, so I always try to make sure I have nice warm hands before I *****, and squeeze the blood down from the middle of your finger rather than from the end.