Let me see your false blue dye positives


I’m waiting a couple days and testing with a red dye test but I want to compare my test to others. I was told “blue dyes are notorious for false positives” but google says they are notorious or evaps which are MISTAKEN for false positives . I assure this is not an evap this showed within 5 minutes and it has blue to it rather than just being a gray shadow. My roommate took a test of the same brand too to see if hers has a “false positive” too , to make me feel better, and it definitely does NOT her test came back with the slight evap but not the clear visible line I have on my test

... what do you guys think ? Experiences.