Wallpaper falling off

[overlander76]

Does anybody else have problems with the wallpaper material falling off the walls and other surfaces? All the "wallpaper" with the rough cross hatch pattern is missing in action, leaving the bare plywood and some old glue residue. The other wall covering (see picture) is now getting ready to hit the floor. I guess it was related to heat. How can I stop it? I was thinking about using a spray adhesive on both surfaces and rolling a rubber roller over the outside. Does anybody have a good repair? I'm wondering what kind of adhesive to use?

Thanks for you help...