I second that.5 gallon pail filled with HOT water and some baking soda soaked for a few hours does an amazing job!!
What mixture? Sam's has baking soda by the 13lb bag.
They've always come off for me after soaking overnight in hot oxyclean water, and then scrub with a brillo pad or something really rough. Those sponges with plastic mesh over them are great.Ugh, I just got a couple bags of empty Heinekins on Craigslist, not realizing what a PITA plastic labels are. I peeled the labels off one by one for one bag after soaking in hot water, which was okay, but now the glue is still there. It's really sticky, as in so sticky I'll pick up one bottle and accidentally have another attached to it. I tried an OxyClean soak and a run through the dishwasher which did nothing. Goo Gone works a little bit, but it takes a lot for each bottle, and that's a lot more elbow grease than I want to waste on ~70 bottles.
Any ideas? Maybe I should just keep the labels on, and then use milk to glue my own labels over top...