I'm thinking you can pickup bacteria from opening the incubator, the door knob going into the bathroom. Camplyobactor is nasty. My sister and her 1 year old son became very ill with it from the dog pooping in the yard and even though they clean up after, it was there. I recently learned that the hand sanitizers that we all use has to be 65% or greater to work. I checked all of ours at the funeral home and they were 62%. Not good. We need to pick our battles. I should wash my hands much more than I do.
