I have done 6 tests in the last 2 days (crazy i know). 4 tests have been Tesco blue dye tests. 1 has been clear blue and the other a pink dye test. all of the tesco tests and clear blue have come back with a faint line almost instantly.. But the pink dye test has come back negative. I don't understand?? I've heard bad things about the blue dye tests but would it really be possible to get 5 false positives ? opinions please ?? I've put a pic up of 3 Tesco tests and 1 clear blue all with faint blue lines!!