Curt TruTrack - grease bar hangers?

Is it common practice or even recommended to put a bit of lubricant on the bar hangers for the Curt TruTrack WD hitch? Two camping trips so far, both within a couple hours of our house and there is already clear signs of friction and rubbing both on the bracket and the bar. I read a few articles that suggest friction is not a key part of the sway control so it makes me wonder if putting a bit of lubricant on those brackets would help with the occasional popping and friction related wear and tear.

Thanks!