Ok, I'm a bit embarrassed to put this up, because I think it's probably a negative and I'm just seeing things. But I really do see a faint line (or more like a line where a line should be - if that makes sense?!). You know that feeling when you look at the sun and then you can just see spots of light. I feel like I'm having the same thing looking at the pink control line ahhh. Your help would be very much appreciated.