Peel off as much of the sticker as possible with your fingernail or a plastic scraper
Soak the sticker with warm soapy water
Apply rubbing alcohol, vinegar, or adhesive remover to the residue
Let the solution sit for a few minutes
Scrape gently with a plastic razor blade or plastic card
Wipe the glass clean with a microfiber cloth
Repeat if needed for stubborn residue
Wash the area with glass cleaner after removal
Avoid metal blades to prevent scratching the glass
Use a hair dryer to warm the sticker before peeling if needed