I have a few random vials in my stash that are half full. How long are these safe to keep? Probably a year old now and wont be using them for another year. Should I swab them Once in a while or just leave them, nothing to worry about?
I usually toss opened vials after six months or so.
Not worth the risk, albeit small, to me.
I’ve had infections in the past and I now do everything possible to mitigate the risks