Can anyone tell me if this is an evap line? There is no color in the line, its just there. Also, what does an evap line even mean? Like regardless, pregnant or not, it's going to show some type of way due to passing through the test line to get to the control line? I have taken 6 tests in the past week and half and they all have come out differently. I am so confused 🤷‍♀️