Soak the sticker with warm, soapy water
Let it sit for 10 to 15 minutes
Peel off the sticker slowly with your fingernail or a plastic scraper
Apply rubbing alcohol, vinegar, or adhesive remover to leftover residue
Let the residue sit for a few minutes
Wipe the residue away with a soft cloth
Use a razor blade or glass scraper at a low angle for stubborn spots
Keep the glass wet while scraping
Clean the glass with glass cleaner
Dry the glass with a lint-free cloth