OMG I am freaking out now reading this! I subbed today using QF 5.7 as well for a NON DOT test at Concentra. Same story though and the hand warmers were the same. Red label that read Spectrum Labs on it. Shrink wrapped and everything. My sample was sent off to ACL Labs in Wisconsin. I too, called in today and checked my batch number with Spectrum. If the temp is right and it's a legit batch why else would it fail? If the temp was off they'd mark that right away. And if it was from uric acid on a DOT screen that would be impossible seeing as standards have not changed.

My heart is going a mile a minute.... ughhhh