Hi, I have type 1 diabetes. I'm using an insulin pump. If my bg is 200 and I take 4 units of humalog, I'll be at 60 in no time. But if my bg is 400 or so, I will have to take 26 units or so to get it down to the 100s. Why such a huge difference in how much insulin I need? I can never use the sliding scale.