Cleaning upholstery help

[Widge]

Hi.
The upholstery on our fiat chausson camper is a little grubby, also has some water staining, i am guessing where somebody has tried to remove marks before, we have tried a foam upholstery cleaner, although an improvement we are also having problems not leaving water marks we are wondering about trying our steam cleaner but dont want to make things worse. Any tricks or tips welcomed along with any recomended products.
Dave

 

[AJM2]

I would suggest trying Autoglym Interior shampoo, has worked very well for us