This morning, I woke up with especially clear lungs and cheerfully picked up my PEF meter in hopes of a score that would validate my new best (I have to get the score several times).
Well, the bar thing shot down the meter and came to a stop at 610. To put this in perspective, the best I've blown since November (my old best is long lost on the system) is 470. I've had 460 once, 450 twice and 440 a few more times. My official best was 420 (it's now 440-450).
I'm 156cm tall, 23 and female. There's no good reason it should be that high. My next two blows were 400 and 410.
I've tried physically shake the meter while blowing, but I haven't been able to duplicate the effect. My finger wasn't in the way. I want to make sure that my other 'high' scores aren't actually a meter problem in future.