Peel top layer of dry were possible before wetting,soak bottom layer with water and washing up liquid(this will stop water drying out between applications of water)soak whole room go for tea while water soaks in.apply a second soak before scraping,three soaks is even better.Just remember wetter is better:)just be carfull of plug sockets etc.if your going to paint the surface and not repaper you will need to remove all the paste from the wall with suger soap as this will react with the fresh paint.(cross scoring can make the job even longer as once the paper is scored it will come off in smaller pieces)