Hey Jo
This cycle I have had pale lines, which can just be seen for about a week before i got a daker line very close to the control yesterday and very dark today with one brand. I was starting to think they were a dodgy batch!
Yet the other brand i used both only gave me one lighther than the control, the next darker the previous day but still not as dark as the control one iukwim.
Over the weekend i have used the FMU as i have been obssessed!
Great info that you shared Danni