The easiest labels to remove by far is Hoegaarden. A quick soak and they come right off. Others are not so kind. Soak in the sink with hot soapy water for at least an hour, some require overnight. Some labels fall right off, some require scraping with a knife or razor blade. Once most of the label is removed, the remaining glue can be removed by scrubbing with a scouring pad. Some people swear by PBW, and it may work the best, but dish soap is ALOT cheaper and works just fine. Make sure you rinse very well.