Strep?
That makes sense. Like most humans, when you get a small cut on your hand, you instinctively put it into your mouth, or suck on it, or lick it. Your saliva is a natural antibiotic. So, after you lance your finger and run your test, the finger goes into your mouth, for all its healing properties.
Right?
Back when I was using the alcohol pads, which were and still are extremely expensive (they've gone up to 5 or 6 cents each at Costco, I used to try to reuse them. My favorite method was to let them dry out, put them back into their foil pouch, then just before testing, I remove the wipe from the pouch, give them a swirl or two in the toilet bowl to reactivate the already evaporated alcohol (I wouldn't trust that filthy tap water), and then carefully and completely wipe down the fingertip that I'm going to use for testing. I was able to get three or four more tests from ONE pad, using this method.
(This brings the price down to about a penny per use).
I haven't tried to convert my single-use lancing device (well, I've rearmed it, but never used it again), because I wouldn't want to infect myself with something nasty by using a lancet that incised my skin for a few microseconds, would I?