Scrape off excess glue with a plastic scraper or old credit card
Soften the glue with warm soapy water
Apply rubbing alcohol to a cloth and rub the glue
Use white vinegar on a cloth for stubborn residue
Apply a small amount of acetone or nail polish remover only if the plastic is acetone-safe
Test any solvent on a hidden area first
Wipe the area clean with a damp cloth
Repeat as needed until the glue is removed
Dry the plastic thoroughly after cleaning