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. Use a plastic scraper or credit card to remove the adhesive, as a razor blade can permanently scratch your glass.

Cheap vodka, rubbing alcohol, or nail polish remover are good items for removing stickers. Soak a paper towel in the product and wrap it around the sticker. Soak for 30 minutes and then wipe it away. Paper stickers may respond to the heating of the adhesive same as the plastic sticker.