Fixing bubbles in wallpaper by cutting them with a razor knife and then the addition of a little glue can save you from costly repair! The glue applicators and adhesive are available at paint stores and home centers for less than $10.
1. Cut a small slit in the bubbled area. Then insert the end of a glue applicator in the slit and squeeze in a little adhesive.
2. Wipe away excessive adhesive with a damp sponge and press the wallpaper against the wall to force out the air, using a plastic straightedge.