I'm new to this.
I've had 4 doses from my first pen and there's still some in the pen, definitely looks like enough for another dose at least. However after priming the pen it wouldn't wind all the way down to the 1 mark so I couldn't get a 5th dose from it even though the pen wasn't empty. Im using a new needle obviously.
Is this normal? Are the pens made not to give extra doses even if there's some left in the pen?