I fill a glass bottle with acetone, pull the nocks out of my carbons, cut the bulk of the feathers off, then stand the shafts up in the bottle for about 10 minutes. If you cut a strip off the wrap on each side (think potatoe peeler), in 10 minutes the wrap has come loose and settling to the botton of the bottle. Then, I just wipe the remaining residue off the shaft.
Here is my disclaimer..Try this at your own risk. I have heard this can effect the shaft although I have not seen any ill effects on my CE carbons. The acetone will remove paint though so keep it off the labels if you want to keep them!
I tried the boiling water and it didn't work on my wraps. Denatured alcohol didn't help much either. I can do about 6-8 shafts at a time in 15 minutes with a lipton iced tea bottle and some acetone. I'll do 2-3 dozen shafts before needing to change the acetone (buy it by the gallon). Just put the top on (metal top) and set it aside until you are ready to refletch again.