One method removed the sticker *and* the sticky residue!
It's notoriously difficult to get stickers off windows, mirrors, or jars. Instead of soaking the glass in vinegar or hot water, try this fruit-based solution.
There's a good chance you'll need to remove stickers from glass at least once in your life. This is especially likely if you enjoy upcycling projects, like genius ideas for reusing glass yogurt jars.