Has anyone else had problems with their Lantus pen not pushing insulin through the needle? I am taking 3 units and I've been told to do an "air shot" of 2 units, but I don't get a nice fluid stream of insulin. Rather, it drips out of the needle. I've also tried an air shot of 3 units and sometimes it drips as well. This is a concern because I don't always know if I'm getting my full 3 units.
Any advice as to why this happens?