Cleaned the passenger door window switch with the pink Lidl stuff on Saturday, and it came up a treat. Ideally it is better done off the car. Once the horrible sticky 'soft touch' original finish was removed revealing the hard plastic underneath, a final quick rub with fine cutting compound resulted in a lovely satin / matt finish with no stickiness whatsoever. Carefully does it on any of the symbols, but they come up clear and bright as well. Did a spare I had too for good measure.
Going to to do the hazard button, alarm, TC, and blank buttons at some point when I've sorted the interior light issue... I did the boot release and drivers door switch a while back and both are still a nice smooth non sticky touch to them