1. Dim the lights a bit for the instrument cluster
2. Try to wipe the inside of of your rear window clean, my Honda Accord used to have do this.
3. Am sure your local dealership would replace your head unit for you
4. Dealership should replace also
For 3 and 4 contact Kia customer care themselves if the dealership isn't doing anything to help you. Good luck
2015 KIA K900 V6 Luxury White