Quick question

Katie • Mommy of the four most wonderful kids!!!!!

Ok so bc I’m so skeptical about blue dye test, I decided to wet this one with water to see if the line went away and it didn’t, so my question is do positives ( no matter how faint) go away like the evap when you put water on it?

This was 1 hour after I put water on it, I just really don’t want to get my hopes up if it’s a evap!