Good afternoon. I have removed the rear seat (5 seater) in order to clean it. I did this months ago and have only now got around to having a go at cleaning it. Basically, it's folded and won't release, in order that I can shampoo the wearing surfaces. Any ideas? There seem to be a few people who have had problems with the seat stuck in the unfolded position, but I couldn't see any where it's stuck in the folded position.