Clear Blue evaporation lines

[MustBeThursday]

Do Clear Blue tests always get evap lines? I did one last night which was completely 100% negative within the 10 minute window. This morning there is a thin blue line where a positive line would be. This will be an evap line, yes? I've never used a blue one before but heard this is common?

Unfortunately, yes... Not sure if all of them, but a lot of them.

I've had the same kind of thing I saw vvvvfl in the time limit and then after about an hour they were very visible and not patchy or thin but I'm not sure had the same with two first response test vvvvfl within time limit and then darker about an hour later. Did u find out if u were pregnant I'm so confused rn.