I know this sounds stupid, but check again in the instructions how to read the results. The tests I have taken say that any line means the test is THC negative - no matter if it is strong or faint.
hhtblogger Reviewed by hhtblogger on . Passed Drug test yesterday but failed this morning? How is it possible that i would pass a drug test with a pretty solid line for THC yesterday and then i take another this morning and i failed it with a very very faint line :wtf: Rating: 5