I was wondering about that, I did not wash before my first reading, just got up from a nap. used alcohol swabs on my second test and came out 60 points lower.
can it really make that much of a difference? I will have to make sure I am washing before every test!
You're supposed to wash your hands before each test, I would imagine that the second test would have been the more accurate one as your hand may have been contaminated during the first test.