We have a thermometer you point at someone's forehead. The readings it gives back are all over the place - we rarely get the same number twice in a row and it can vary alarmingly by 2-3 degrees C from moment to moment. Generally we take five or so readings and if any of them are high, we take that as a fever. (When someone is well, it doesn't seem to ever show a high reading.)
Is this normal or have we got a duff thermometer? Can anyone recommend an accurate, reliable one? Thanks!