I always test again if the line is not clear enough, but I also know that there is no way to get that line if you are not pregnant. You must have the hormone in your urine to make that line show up, faint or not. good luck ♥
after about 5 mins.? I even had people in my office look and they seen the lines too! I have read that the first response test do NOT have evaporation lines and that if I see a line even if it's very faint that I'm pregnant.