i use Meguiars APC , google it , its £20 for 3.78 ltrs i use for car valeting cleaning interior plastics and alloys etc , I dilute mine 10-1 ratio , cleaned some white pvc panelling on a bay window on friday . it was grey and had'nt been cleaned for about 3yrs and it came up like new , i used a non scratch scourer and a diluted mix in a spray bottle , A little goes along way . Mike