Wallpaper On Walls shows you how to easily remove wallpaper glue and paste with a sponge. You should use a dulcet sponge because it easily removes wallpaper glue. The scrubby side is used to soften wallpaper glue and the cellulose side is used to clean the residue. Next mix wetting agent with water and wet sponge. Using the scrubby side move in a circular motion to loosen the paste. Flip the sponge over and wipe the paste from the wall. Always rinse the sponge and change the water frequently.