Strange thin second line on LF test

[whydiditalkaboutbruno]

Has anybody experienced a really thin second line on an LF test?

Could be a faint positive. Maybe test again to double check?

What? A positive line you mean?

Yes so it looks like a positive result but the second line is a perfect really really thin line, not ‘faint’ but looks really odd!

All other LFs are completely negative

A positive can be just a thin line too. But if you’ve tested again and they’ve been negative then maybe it was a dud test.

It's probably a watermark/evaporation line. However DS2 got a really faint positive today (tail end of infection) and when it dried it went thin like this. DS1 also got a really skinny line the day before he tested positive, so it could be a faint positive that's sort of dried into a line.