1. Apply WD-40 to the adhesive. Spray a generous amount of WD-40 directly onto the adhesive. Allow the WD-40 to sit for several minutes to penetrate the adhesive.
2. Scrape off the adhesive. Use a putty knife or scraper to scrape off the adhesive. The WD-40 should have loosened the bond between the adhesive and the surface, making it easier to remove.
3. Repeat steps 1 and 2 if necessary. If the adhesive is particularly stubborn, you may need to repeat steps 1 and 2 several times. Be patient and keep scraping until all of the adhesive is removed.
4. Clean the surface. Once all of the adhesive is removed, clean the surface with a damp cloth to remove any residual WD-40.
WD-40 is a safe and effective way to remove old adhesive. It is important to test WD-40 on a small area of the surface before using it on a large area to make sure that it does not damage the surface.