Use hot water and vinegar, hot water would help to loosen the wallpaper glue, and the vinegar would help dissolve it
Remove it by using fabric softener and warm water
Using ammonia and hot water ( 1 quarter of ammonia + 2 quarter of ammonia)
Use warm water+ liquid detergent+ cellulose paste.  Apply it on the wallpaper and leave it for 5 minutes and then start pulling off the wallpaper
Use steam wallpaper stripper   _{Your Comment}