Can anyone give any correct information on the accuracy of these? Anyone tested clean on several of these and then dirty @ the lab? 6'1", 215 lbs. I took one puff of dank 2 weeks ago after 65 days clean (daily before that). I've been testing clean on several home strips for about a week now, so I'm assuming my body is clean again. Pre-employment test next week, and yes, I have QF and know of it's benefits, but I would rather not sub if I am testing clean (logistics of time/interviews/test may not make it possible). I plan to take about 10 more tests over the next 4-5 days, so if they all show clean, including morning of, could I safely assume I'm clean? And if so should I use my own undiluted urine, or dilute also, or use the Vale Triple Strength if I decide not to sub. Also, can anyone comment on the quality/accuracy of the ebay test strips vs. Walgreen home testing kit. Thanks.