We've got to go into town so I'll get some superdrug ones and some more frers LOL
Don't think I can be imagining it anymore as hubby also saw the line, so I'm hoping it's not an evap but it's really barely visable so not sure if there's any colour on it, not sure if you get evaps on FRER's.
I've got to go to work tomorrow so I won't have time to post pic if there's anything to see until I get home after 6pm.
Good luck to all of us
xx