I hope you're all in good health.
Recently my peak flow meter completely stopped working - not at the best time either - and since I received my new one ( yay for amazon!! ) the readings have been at least 100 below what it usually is.
I've toyed with the notion that it was broken for a while before its stopped working, but that means that the last time my peak flow dropped and the meter showed it at 320 it could have been at 220...
I was wondering if anyone else had found that peak flow readings vary depending on the meter.
ps. I hope you all the best of health in this new year