I have a different problem with my pump. It seems that on the day that my insulin is running out of insulin and by the end of the day, I probably will be changing out the infusion set for a new one, my BG readings are very high. Since I change sets every 3 days, I can count on higher than usual readings on those days. My endo, my "so-called" Medtronic aide, and my great nurse all think I am nuts. But something certainly changes pretty regularly.