I have a friend who has 4 different machines. 3 of them are brand new and one is 1 month old. she sticks her finger, using the same drop of blood for each machine and gets 4 different readings. They are not even close together either. this am she got 155, 199, 278, 306.
she has discussed this with her dr and he gave no answer as to why they are sooo far apart. any clue????