Tried bringing it to the dealer for this problem as well - nothing they can do.
What I do is spray wd-40 in between where the plastic rubs together (end of the steering handle and the top deck). It's the circle that rotates left to right - once WD-40 is sprayed in between it becomes loose as butter and no squeaks. But this only lasts about a week or so.
I tried using fluid film and other grease but it ends up building up and attracts a lot of other dirt.