Water test

Krystal • TTC since February 2014. Miscarriage at 7 weeks on Dec 4 2015, 2009 son, 2018 daughter
I was reading somewhere that if you got a faint line/ evap, you can wait for it to completely dry and test it again with water, and if it was an evap the line will disappear in the time frame and if it was actually a positive the line will still be there... Has anyone tried this or heard of it?