I've had shocking wind for the 12 months I've been on Metformin! Mentioned it to a nurse, she laughed and said it was something that happens with Metformin!
Outdated Accuchek Strips
All you need to do is to change the date on your meter! I find the Accucheck matches with my blood tests within 2 %. Drop Accucheck an email if you're worried about consistency, I've not found it so.