Evaporation lines getting darker?

[Bumblebee1308]

My evaporation lines have got a darker and a stronger blue over the past three days... when I take them I don’t get a line it’s 4 days until my period... Has anyone had this before? 🤞🏼

I can’t add a picture it doesn’t seem to be letting me!

That’s what evaporation lines do.

@PegasusReturns

That’s what evaporation lines do.

I mean I've taken three test the first had no line second day a faint line third day a dark line but they all appeared after the three minutes