The dashboard, console, door panels, and other plastic, vinyl, or wood surfaces can be cleaned using a mild soap and water. Caution must be taken to keep water out of electronic accessories and controls to avoid shorts or ruining the components. Again special cleaners are available to clean these surfaces, as with other cleaners care must taken in purchasing and using such cleaners.
There are protectants available which can treat the various surfaces in your car giving them a "shiny new look", however some of these protectants can cause more harm than good in the long run. The shine that is placed on your dashboard attracts sunlight accelerating the aging, fading and possibly even cracking the surfaces. These protectants also attract more dust to stick to the surfaces they treat, increasing the cleaning you must do to maintain the appearance of your vehicle. Personal discretion is advised here.