I am trying to self inject but I am really struggling with getting what I think are air bubbles out of the syringe. I have tried twice and both times I have a little bubble like break in the liquid at the bottom of plunger and at the top - in exactly the same place each time. I have tried to flick and tap and move them but they dont go and bringing air back in then expelling also does nothing. What am I doing wrong or are these not air bubbles? Thank you.