I learnt this the hard way, that stuff is only good for removing nail varnish. If it's a proper vinyl sticker, go at it at the sharpest point with a finger nail until it lifts and then start pulling away (think back to your teenage years). Any sticky residue left remaining will then take several washes with warm soapy water followed by much polishing.

Sorry, there's no quick and easy trick that I know off, but then again I'm more prone to sticking them on than taking them off. You may want to consider covering the old spot with a new sticker, might I suggest

http://www.xt660.com/showthread.php?t=2609

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