This may sound weird but for years ive used furniture polish Yes your standard pledge etc etc
Ok think about it! it repels dust, cleans....
For the dash board, radio etc i spray the cloth then give the surface a wipe. When i get scuff's on trim like mark88 i just spray directly then wipe.
IMO i dont like the "wet" look a lot of these products leave.
Oh and it doesnt cost anything cause you can nick it from the kitchen and nobody knows?????