So took my last red dye wandfo test today after getting very faint positive on 3 clear blue 6 days sooner tests which are the same sencitivity as frer not sure how sencitive these ones are but i swear tjere is a faint line wasnt there when i did one same time as the clear blue but today there is. Dont know if you can see it on the pics but its there the test says to dip for 3 seconds then read at 5 mins and the faint line were there at the 2 min mark.