I was just looking at the box of the prescription of Lantus I got. (box of 5 clear tube things) . It says its refills for the opti-clik pen?? But I dont have a pen contraption thing... should I? Ive just been putting the needle into the rubber end to draw it out. And thinking about it, the little rubber thing is open to the elements.. is this contaminating my needle when I stick it in to fill the syringe?