I have tried Ambersil foaming upholstery cleaner, and Tarspot remover without much success personally.
I have also tried meths, brake cleaner, 'sticky stuff' remover, and even petrol, but the problem then is that anything too harsh takes the white symbol off switches (boot release button as an example).
But......I have recently tried something that works a treat, and cleans off the sticky 'soft touch' coating, without damaging the plastic surface underneath. It leaves the hard plastic satin finish underneath looking brand new, nice and smooth to the touch, without any stickiness whatsoever, without removing any switch symbol.
It is Lidl's 'Cien' nail varnish remover. They do two types; the standard acetone nail varnish remover in a blue bottle, but also one for acrylic nails in a pink bottle, which is not as harsh. It also has a handy dished push dispenser on the top which holds the fluid to dab your cloth or cotton bud into.
I have recently done door window / mirr or switches, light / fog light switches and boot release buttons, and they look a treat. It didn't damage or remove the relative symbols on them either, which harsher cleaners can.
Others may have their favourites, but having tried all the others recommended, this product certainly worked better on mine with exceptionally good results
It is important however to use the pink version for acrylic nails