What will cause a brand new (bought yesterday) test to just stay blank? I read somewhere is REALLY hard to oversaturate which is what I assume it was. I've waited 10 mins and no control line nothing. Please advise.
If you have no control line, then the test isnt working and should be considered a dud. The control line is what tells you the test is working properly. Its likely that it was just a bad test and nothing you did, so just throw that one away and go get another one. Good luck.