i read on another thread to soak bottles in oxiclean to help get the labels off. I tried it the other day with 4 cases of bottles, and didn't have to scrape a single label off. After only 1 hour sitting in a bucket of oxiclean, the labels fell off. I had to scrub a little to get the glue off, but not hard at all. After i was done, i had most of the labels sitting in the bottom of the bucket. I have read of people having problem with residue on bottles if they let them soak overnight, so in my limited experience, it doesn't seem neccesary, just an hour or two will do.
I also rinse after use, rinse with hot water on bottling day, put in dishwasher on a hot rinse cycle, then bottle right on top of the dishwasher door, no mess to clean up if you spill a little!!