I just found out today - sorry if everyone else knows this already - that 1 in 10 needles is likely to be faulty and not deliver the required insulin dose .... which is why one should ALWAYS do a test "airshot" of 2 units before dialling up the dose. This no doubt explains why I get an occasional otherwise unexplainable morning high as up until now I didn't do an airshot with my nighttime Lantus but just kept the dial set for my normal number of units....
Others take note!
Others take note!