Typically use Meguiar's Interior Detailer / Cleaner for the small stuff (to wipe the dust off basically), and simple green on plastic parts that get streaks on them easily. For the seats and other leather or vinyl pieces, I use Lexol or Mothers VLR. The VLR especially works well, but I will have to try 1Z for plastic parts, 'cause simple green isn't the most pleasant smelling thing in the world. Plus, I need something like that for another car I have which before I owned it, was smoked in and sat outside with the windows down a lot