How do you take off the label glue on the plastic soda bottles .

soak them in water and blue dawn dish soap

WD 40 will work a treat. I use it all the time.

Fill with water (to make them sink) and put in sink.....fill sink with very hot water and Dawn.......let set and scrub with a textured cloth

GooGone

There is a product called "Goo Be Gone" and there is also a generic recipe for it (which I can't locate right now). I am sure you tried soaking the bottles in warm soapy water. You can also try vinegar with warm water -- spray it on and let it set for a while. You may have to do it a couple times.

Goo Gone or WD40. Nail polish remover may work but can damage some plastics.

Soak in warm water. Goo be gone. Lighter fluid, but use with caution.

I always soak in warm water. It takes a little while, but the glue and everything comes off neatly without damaging the bottle surface.

white vinegar or glue be gone