I cleaned this sofa today, cleaned up ok, some marks would not shift but customer was pleased.(she has already booked £100 of stainguard for next week.) In some areas though you could just make out a line of brown stitching within the cream/white area, when wet this line grew and extended another 6 inches or so. i checked the rest of the sofa and found quite a few so explained to customer that they may be more obvious if i wet them, she didn't care anyway so i continued with clean and tried to avoid these lines as much as possible.
My question is , has anyone experienced this and if so any ideas why it happens.
thanks, ben