You really shouldn't be tweaking tests and giving people false hope if your not tweaking them right! You are giving false positives when you invert the tests or make them negatives. It will pick up even a Evap line. Use apps that actually have more than one option like saturation, warmth, etc. like this one. I feel bad for others seeing people tweaking tests and not doing then right. I am all for tweaks on faint positives or helping people with tweaks but do them right.