cheers for the tips andy
soap and peanut butter failed miserably and didn't want to waste the alcohol I have
ah no I'm only messing.I didn't try it to be honest.I hope it works
Peanut butter as Andy said, smear it on, rub it in and lick it off .. Otherwise a white rubber eraser, a bit of all purpose cleaner and a tooth brush or dab of tar remover (with a wash afterwards).
Also heard autoglym fast glass is great at removing it but never tried