I had cases of wine bottles from a wine bar I had to de-label. Months ago, I tried soaking in the bathtub, and that was a lot of work. This time, I used the oven method.
Make sure you turn on your vent to the outside, or you will end up with a lot of glue fumes. Filled up two oven racks with bottles. Waited 10 minutes, and then started peeling off labels. Used an oven mitt to hold the bottle, and a single edge razor to help remove the label. The problem is: A lot of glue left on the bottle. I tried soaking in dish soap and Oxy clean. Oxy Clean worked best. So, what I ended up with is:
Oven at 150 degrees.
Rubbermaid container with warm Oxy Clean solution (sorry, I forgot the ratio of Oxy Clean to water: 1/2 cup to 2 to 3 gallons?).
1) Take one drained bottle out of fast rack (about 10 bottles in the fast rack) and put into cardboard wine box.
2) Take bottle out of oxy clean solution (about 8 bottles soaking)
3) Take bottle from back of the stove, fill with Oxy Clean solution from bottle just removed to sink the bottle
4) Rub glue off and any remaining label with the help of a steel wool pad and single edge razor
5) Rinse inside and outside of bottle with clear water
6) put into Fast Rack to Drain
7) Move bottle from the front of stove to the back of the stove to continue cooling
8) Take a used wine bottle with label on, and clean inside of bottle
9) Put used wine bottle in oven to heat up the label
10) Removed heated up bottle from oven (use oven mitt, about a dozen bottles in the oven)
11) peel off label (single edge razor)
12) put bottle on front of stove to cool