one thing i noticed was the bottle I used last week did not have plastic around the box and this new one did.So I wonder if it might have been messed with.
All QF boxes come shrinkwrapped when they leave Spectrum Labs. If the shrinkwrap is missing or damaged, then someone had gotten inside the box. Its very possible someone had sabotaged your QF batch. I seen cases of unsavory characters where theyre trying to pass off water with added yellow food coloring as "synthetic urine". Any QF box that has missing or damaged shrinkwrap should be steered clear from.

If the specific gravity was off, the sample would have come back dilute.
Not necessarily. Under DHHS/SAMHSA regulations, a urine sample is ruled "substituted" (aka "not consistent with human urine") when the creatinine concentration is less than 2 mg/dL and the specific gravity is less than or equal to 1.0010 or greater than or equal to 1.0200 on both the initial and confirmatory creatinine tests (i.e., the same colorimetric test may be used to test both aliquots) and on both the initial and confirmatory specific gravity tests (i.e., a refractometer is used to test both aliquots) on two separate aliquots.
A "diluted" sample is ruled when the creatinine concentration is greater than or equal to 2 mg/dL but less than 20 mg/dL and the specific gravity is greater than 1.0010 but less than 1.0030 on a single aliquot.
Source:http://www.workplace.samhsa.gov/Drug...ary%202005.pdf

the quick fix I used today is batch f11l-07
QF 5.7 was introduced in the summer of '08, right on the heels of QF 4.2 introduced at the same time. QF 4.0's have 03-07 ending batch numbers.

QF batches ending in 07 are now on the recall list as of 8/13/09. If you have an 07 and earlier batch, do not use!. Swap it out for a replacement at Spectrum Labs (not the vendor you bought it from). Contact info can be found on the urineluck website.

Spectrum will soon introduce the Quick Fix Plus which comes in a 3oz bottle. Formula number and prices are not available at this time.

I honestly think Spectrum should bring back the 4oz bottle. When I first used the QF nearly a decade ago (when the formula was 3.0) it came in a 4 oz bottle (with an optional delivery bag for "stealth" situations). I still have both the empty 4oz bottle and unused delivery bag to this day. :smokin:
Burnt Toast Reviewed by Burnt Toast on . Quickfix 5.7 used at labcorp Well new to the qf. I've been doing so much research on these threads and decided to try it for myself. Got tested just last Friday for pre-employment (August 28th, 2009) everything went well, kept the temp in range and nobody watched, or listened. Now I'm waiting for the results... Hopefully I'll hear something tomorrow. The reason why I'm posting this is because nobody has posted any recent threads about quickfix 5.7 and if it still works at labcorp. I guess you could say i'm bein' Rating: 5