when you use detergent you MUST wash of all the residue with water otherwise it can cause a rash on your skin (worst case). using "luster" on your dash will make it shine which is a major pain when driving on a sunny day. dashboards are meant to be dull.
never use lustur on leather or plastic sheets as it can make the surface VERY slippery. for the roof you can get a variety of cleaners depending on the material. for vinyl i'd suggest using surf and water or even vinyl cleaner. but for cloth i'd suggest only a very mild mix of detergent and water and a VERY light hand.
there are many shops in KHI which can help you out, since i'm not in KHI i would not be able to guide you any better than this at the moment.