Yeh I wish they would sell that glue they use on domestic bottles stickers.Sticks better than virtually anything else :O
Taking on-board what you posted I've just tried some cooking oil.Same affect.Takes off the glue easy.Been looking for something like this for ages so big thanks
I tried all the stuff you had posted before the oil.I keep those spray bottles.I use one with a few squirts of Washing up liquid in it as a pre-soak for pots/pans and plates when I'm cooking.Makes cleaning them easy and saves loads on washing up liquid.I also use another of the same as a cheap none aggressive bike cleaner