I just got done using a test strip and the test came up as negative, but the indicator line was faint, which I assume suggests that there is THC in the urine, just below the detectable level of 50 ng/mL. I have my test tomorrow morning and I plan on using N2's dilution method in the morning, but I am also wondering if I need to substitute still. I have a clean donor willing to help, so it's a sure thing. Any thoughts on what I should do?