Set up a ladder in the area in which you plan to work. Scratch the surface of the vinyl wallpaper border using a wallpaper perforating tool. Since vinyl wallpaper borders prevent moisture from going through the wallpaper, it's important to score the wallpaper so the wallpaper removal liquid can get through to the adhesive.
Mix 1/4 cup liquid fabric softener with 1 quart warm water in a spray bottle. Spray the perforated vinyl wallpaper border liberally and allow the fabric softener solution to sit on the border for up to 15 minutes to soften and loosen the wallpaper adhesive.
Peel up the edge of the vinyl wallpaper border using a plastic scraper. Pull the loosened piece with your fingers to remove the wallpaper border completely. Apply more fabric softener solution to any stubborn sections of wallpaper border.
Mix a 50/50 solution of white vinegar and warm water in a bucket. Dampen a sponge in the solution and use it to wash the fabric softener and any remaining wallpaper adhesive residue from your walls. Dry the walls with a clean, dry cloth.