Wallpaper dissolves: apply wallpaper paste with syringe
Have you ever had that? The wallpaper dissolves at the seam a bit? No desire to repaint or get out a thick brush? You do not have to: Take a small syringe (there are in the pharmacy or at the next GP visit), wallpaper paste (which I always keep the wallpapering in a screw-jam jar) and spray in the detached seam of the wallpaper. Drive with a rag over the wallpaper and wipe off the rest of the paste with it. Wallpaper sticks to the wall again without much effort.