I just switched from MDI to the Omnipod a few days ago. I noticed a previous thread talking a little about removing left over insulin from an expired pod and re-using it. How safe is this? Is the insulin efficacy the same? Is there greater infection risk? I'm quite insulin sensitive, so the minimum 85 unit fill volume is more than I use in 3 days. I don't want to waste 10-20 units of insulin every time I change my pod!