There are many in the market, but personally I don't like too much gloss on the dashboard plastics. I prefer medium to low gloss products
I use Luxury Leather on my personal vehicles and also for my customers (I detail vehicles part-time). I use it for both leather and plastics. Don't get confuse with the product name. It's a very versatile product. It can be used on both leather and plastics.
Here's the product description from Soft99 Europe Facebook page
Use it as a quick detailer for leather and faux-leather interiors! It will easily remove everyday dirt while greatly nourishing and moisturising the surface, leaving a protective layer with no sticky or damp effect afterwards!
Use it as a dressing for interior plastics! It will nourish and re-saturate colours, darken faded parts and leave a natural finish. No needless shine, no sticky feel โ just the way you like it!
Few other quality products are CarPro Pearl, Meguiar's Ultimate Protectant and Armor All Semi Matt Protectant.
Choosing the right product is the first step. Staying consistent with application is super important. Try to use it at least once in 3 months. You may apply it once a month in case of harsh conditions where the vehicle is exposed to sunlight a lot.
