id use either castrol contact cleaner or maxima brake cleaner(MAXIMA SMELLS OF ORANGES mmmmmmmmmmmmmmmmmmm nice) there also both good for putting grips on/off(it dries)removing the scum after you take stickers off,before fitting sticker,cleaning rims etc,there great,carefull with the maxima on paint though,it must be a bit stronger than the castrol as i tried it on a painted item and it started to remove it,so id go with the castrol,should be able get it from halfords etc,
ive been using it for about 15 years
spray some on a rag and rub,its just like some brake cleaners