Wish I could help, but I don't want to mess with the stock HIDs for the exact issues you are having.
Exact same bulbs with similar install story here. I bought the bulbs online from The Retrofit Source and the dealer quoted me $20 to install both. It was the first HID bulb install on a Cadenza my dealer had to do and it ended up taking them quite a bit longer than they originally estimated. They apologized for the long wait and told me it was "on the house". The CBI's provide better lighting than the stock bulbs and the color is more aligned with the rest of the front end lighting elements. I've had them in about 6 months now with no issues.I bought the OSRAM 66240 CBI's, went to the dealership and they installed them for $30. This was the first time that someone attempted to replace the HID's in our car at this dealership, so they didn't know what to charge. They are a perfect pure white and output a lot of light. Have had no issues with them at all.