Vanessa, I find the same thing happens to me. I eat the same cereal all the time and usually get a reading around 5.5-6 and then all of a sudden I will get a 7 out of nowhere, then it goes back to my lower readings. I don't worry about it too much as long as it stays down the majority of the time. I am on insulin injection for lunch, dinner and before bed as those levels had started to creep up in the last week.