Warm the sticker with a hair dryer or heat gun on low
Lift one corner with a plastic scraper, credit card, or fingernail
Peel slowly at a low angle
Reheat stubborn sections as you peel
Remove leftover adhesive with adhesive remover, rubbing alcohol, or citrus cleaner
Wipe the area with a microfiber cloth
Wash the bumper with soap and water
Dry the surface completely
Test any cleaner on a small hidden area first
Avoid metal tools that can scratch the paint
Use fishing line or dental floss to cut through adhesive if needed
Apply wax after cleaning to protect the surface