Spray bottle with equal amounts of vinigar and hot water. Spray on wall. Leave for about half hour and then scrape off.
Steaming is my preferred method.
here is a tutorial and video I made showing how to remove wallpaper = https://www.charlestoncrafted.com/experience-removing-wallpaper/
The best product I use is DIF concentrate. Mix it with HOT water in only the amount you'll use at once. Score the wallpaper with a scoring tool (HomeDepot) and spray with a pump hand sprayer. Allow to sit per instructions and test if the glue is loose. It's ready when large sheets of paper come off with your flexible scraper. Keep a lined garbage can in the room for the trash.
Once removed, respray the wall with DIF again and wash off the remaining glue. Rinse your sponge often so you don't spread it around. Keep repeating until the walls are clean.