try WD40
lighter fluid
Stick some on a cloth and wipe the glue off with itThats a bit extreme ... might work by freezing it and peeling it off
Ah telt them that earlier!swan lighter fluid or petrol(better for softening glue) , just a drip on a rag and wipe off ther glue, make sure yer wash down with soapy water after , stops it marking paint, got my stikas off, ruins yer landy the county stika does
try warm it up with your hairdryer first