Fill a spray bottle with hot water. If you have a large area of wallpaper to remove, you can use a pressurized sprayer, such as those used for weed or bug control.
However, do not use one that has previously had chemicals in it.
Spray the surface of the wallpaper with the hot water and let it stand for five minutes. As the water soaks into the adhesive, it will soften the adhesive and make it easier to remove the paper.
Scrape the surface of the wallpaper with a wallpaper scraper or a putty knife. Work in small sections of approximately 12 inches by 12 inches.