Hi - The interior of my roof is a bit dirty down the sides. Not sure what type of dirt just looks a bit grimey. I've not had the car long and was told it never leaked into the car... which it hasn't the 2 months I've had it. I was going to ask the local valeter to have a go at cleaning it while he has a go at cleaning the interior. Chances are he's just use Autoglym upholstery cleaner on it. Do you think that would be OK or should I not mess with it? I suppose he might end up doing the whole of the interior of the lining, and wasn't too keen on that!