I have the same checking regime so I think that is fine. It is looking for more of a pattern rather than the odd elevated level. I find my fasting level is worse if my night has been sleep disrupted due to the little person and some foods trigger off a higher level too, even though my overall diet is fine. You will find your own pattern and the small things that may need to be changed - even just the addition of some extra exercise (like we have the time to fit that in too )