i might've messed up. a goofy mistake, being it's not my 1st cycle.
i got ahold of some vials where the stopper just didn't look like it was made to punch a pin through. i stripped off the metal band and removed the stopper. i was actually thinking it was going to be a type of stopper that would stay in place, when put back on (like a wine cork). it's not :-( and now every time i pin, i have to take the tape off the vial (that's all that's holding the stopper on) and draw, then replace (and re-tape) the stopper.
my concern - am i increasing the chance of letting airborne contaminants into my vial, for the few minutes it takes to pin up? am i reducing potency, due to too much oxygen exposure? i had planned on finishing the vial, like this, then just punching through the stopper on my next vials. if y'all think it's best, i could cut a hole out of some strong tape so that the edges of the stopper are all that is taped and start punching through. what should i do?
thank you