Interesting piece of speculation.
I haven't encountered any mention of it in-game, but my Au Ra is stuck on another server at Level 1, so...
Since the horns are, as I understand it, sensory organs, I wonder if they aren't hand-cleaned (gently) with something akin to a dry shampoo. Seems like it might be a preferred method to remove excess oils and dead/dry scales. Perhaps there are also tools, something like a soft netting or akin to a loofah, that could aid in hand-cleaning. I imaging the Raen might employ these more frequently than the Xaela, though I'm just a neophyte with lore.
I haven't encountered any mention of it in-game, but my Au Ra is stuck on another server at Level 1, so...
Since the horns are, as I understand it, sensory organs, I wonder if they aren't hand-cleaned (gently) with something akin to a dry shampoo. Seems like it might be a preferred method to remove excess oils and dead/dry scales. Perhaps there are also tools, something like a soft netting or akin to a loofah, that could aid in hand-cleaning. I imaging the Raen might employ these more frequently than the Xaela, though I'm just a neophyte with lore.