Evap line disappears with water?

So I done a test this morning. BFN. Later noticed an evap line but very thick and blue. A friend told me if you dip it in water the evap disappears. Tried it and still has a line! Not getting excited at all - will test again in 2 days. But wondered if anyone else has heard of/done this or knows any science behind it?

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors