What I did was get the binax now test and cut the red strip off a dollar tree pregnancy test and placed it where the positive covid line would go and then took the picture at an angle so that it didn't look like a separate piece
my friend invites me to big party at his town..like bounch of peeps over there i need this to work soon...please...i dont wanna go there am introvert 😂😂😂
I know this is late and won't help you but for others who might try it, do it without the solution, it's a buffer solution that balances pH opposite of what you want if you want a false positive :)