I am sure its a dumb question. With the fragility of IGF how does everyone ensure they get all the air out of the pin? I usually draw the IGF in a little then press the plunger back pushing the IGF back into the solution and wait till the bubbles come out of the tip. Can flicking the tube damage the IGF inside? Working around people in the med field I know it takes many many cc's of air to do damage but I try to get all the air out before pushing it.