Evap or bfp

Didn’t take a picture when it was first done, there was a slight faint line but as it’s dried the line has become more visible and it’s developed a thin blue line to the left too? I know your not supposed to take notice when it’s dried but I wanted to get a picture to show the faint line and couldn’t earlier as I was at work. Does this look like it could just be an evap? Not getting my hopes up