Why are you concerned about loosing insulin?
I ask the question because I have this thing about wasting things and need to justify expenditures in my head. When I use an insulin pen, I have no problems priming a unit or two for each shot. That means if I give 6-8 shots a day for meals and corrections, I am loosing say 8 units. So over the 3 days of a pod life I am loosing about 24 units. If I prime 2 units, I would be loosing 48 units.
For some reason when I see 24 or 48 units left in a pod after a three days, I see this as a huge waste so I need to put it in the pen perspective to make myself feel better.
I do not pay for insulin (my insurance does) so wasting makes no economic difference to me. I try to use as little as possible to save my insurance company money, because I am of the belief that trying to be frugal with the insurance companies’ money means that rates may not go up 