Dollar Store test

Ka

Just curious. I took a test about 8-10 minutes ago... a very very faint pink line showed up disappeared and showed up again after a few minutes. I know the package says the results are invalid after 10 minutes. I’ve never had the line show up that fast after the 10 minute mark. It usually took a few hours. How long does it usually take for the evaporation line to show up?

Top was at first bottom was after 10 mins