Readings are higher than normal or inaccurate

Possible Cause #1
Unclean Mouthpiece

Solution:
Try sterilizing the mouthpiece in hot water or use a new mouthpiece

Possible Cause #2
Blowing too hard

Solution:
Blow a long and steady breath into the unit until it stops beeping or till you hear/feel a double click/beep.

Possible Cause #3
Unit due for calibration

Solution:
Book your unit in for calibration at my.andatech.com.au