Faint line tip.

I never thought of this before but my sister told me to hold my test up to the light. If there is a second line, even if very faint, you will see it better when the light is behind it. I just did this with mine and I know there is a second line for sure! I compared it with an unused test and you couldn't see any lines, not even the control line through. Thought this would be helpful :-)