I found a mobile test company that came to my house and tested at 15 ng/ml. The technician said I was a pass but since the line was faint he advised that LabCorp (the pre-employment test lab) might flag me for additional testing and/or come back with a positive test since a faint line indicates some THC in the system.
The 'technician' is feeding you alot of B/S here. A "faint" line is still a negative. Even synthetic urine controls (which contain no drug metabolites at all) can produce a faint line on an assay.

All detox products, "masking" agents, etc; "work" because of dilution. That means they "work" because of the water that youre required by the instructions to drink with them. They "mask" by diluting the THC metabolite concentration that is present in the bladder. The same thing can be accomplished for $$$ less by following the steps outlined in N2's Dilution 'sticky' thread.

In short, "detox" products are nothing but a big scam to seperate the credulous from their cash. You can spend up to $250 on a magic elixir, and accomplish nothing different than what can be accomplished using water and vitamin B2.

There is no product that can rid the body of THC, as the product sales pitches would like the consumer to believe. The only proven way to permanently rid the body of THC is time and fat-burning exercise.