Just because scrapers and broad knifes look the same, they are different.

Be sure to use a "Wallpaper Removal Scraper." I have tried every scraper possible, expensive as well as very cheap. Believe it or not I have found the cheaper scraper works the best for me, the red star series wallpaper scraper works on all types of wall-coverings.

This Wallpaper Remover Scraper was designed with a sharp shaving edge for stripping wallpaper. This is exactly what you need to remove wallpaper. With the sharp shaving edge you can get under the wallpaper, definitely speeding up the process.

When using the Wallpaper Removal Scraper each side of the scraper works differently flip the scraper over to see which side works the best for the type of wall-covering you are removing.