After checking LO's temp rectally at every diaper change in the past 24 hours with three thermometers, getting inconsistent readings, I'm planning to go out and buy maybe 2 more thermometers in about an hour. Which ones have you used that you trust to give you consistent, accurate readings?

Eta: two of the three that we have had good Amazon reviews, but they're weird brands. The one DH bought in store last night without checking Amazon reviews, has been giving consistently the highest readings that has 50% 1 star Amazon reviews. We gave our safety first one to our babysitter.