Here was the post - I didn’t say much - but @mike_g also mentions a similar issue with a “second chance” on a relion meter.
Moral of the story - if you want accuracy you need to use the first drop of blood. If you don’t care it you are +/- 18 mg/dl (1 mmol/l) then go ahead and use the second chance thing.
EDIT: ok - second moral - always trust your gut feeling
