Thank you all for your thoughtful responses. [And sorry it has taken me so long to reply].
All good points, and I will do some investigating. :wink:
As for syringe size: I used 12mm, which sounds like it is the longest. [too bad, because I was hoping that might be the culprit]
Injection sites: with the pen, I mostly used my stomach. This site is fine - no hardening of tissue, no bruises even and, further, my endocrinologist checked this site very recently and said it looked great (it's one of my favourites, but I am pretty good at rotating).
Angle of injection: To be honest, I'm not sure if you still inject on a 45 degree angle with pens or not, but I would have looked at the directions. Any tips on injection angle from you pros?
Pre-injection injection: Kewgirl, thanks for this tip. I will definitely ensure I check to make sure the insulin's ready to go before injecting.
Thanks to everyone, once again, for all the advice. You have helped encourage me to try again with the Humapens - fingers crossed because I think it would help a fair bit!