You can use hot, soapy water, white vinegar, rubbing alcohol, window cleaner, nail polish remover, WD-40, and cooking oil to remove glass labels. You can also apply heat with a hair dryer or steam cleaner.

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Soak a rag or paper towel in rubbing alcohol. Cover the sticker you want to remove with the alcohol-soaked rag. Let it sit for about 30 minutes. The sticker should wipe clean afterward—but if it doesn't, gently scrape away any remaining residue with a razor scraper.