Well I'm sure the temperature strip on the bottle isn't 100% accurate. The cup the lab will give you to pee in will have the same type strip more than likely so it's accurate enough for labs to go with it. So I would just go by whatever the strip says.
Amdtaz Reviewed by Amdtaz on . First Check Home Test Came Up Negative, Should I Still Use Quick Fix Plus? I have a prescreen employment drug test tomorrow. I haven't smoked in a month (exactly up to the day). I ended up purchasing the 3 oz QuickFix+ Canadian 5.7-1 (with Uric Acid). First time subber here. I bought a FirstCheck home test from CVS. They claim to be up to 99% accurate, and test up to 50 ng/ml. I had a very feint line next to the word drug. They explain in their instructions that if there is any visible line at all, it is negative. I have my drug test with LabCorp. I am still a Rating: 5