This is just off the top of my head, but what's going to grow in Betadyne? I wouldn't be surprised to find that the gallon jugs of it aren't sterile either.

Once you open a tube of Neosporin, it probably isn't sterile for long, but since the stuff itself is supposed to kill nasties, you don't need to toss a one-ounce tube after using it once.

I could be missing something here..... We need a professional to chime in here, I guess.

Sue