You may well have missed this upon initial viewing, I know I did, but after reading Gross' PBP, went back and had a look. And right he was really:
12:18 a.m.: The champion enters the cage after a coat of Vaseline is slathered on his face. I'm sorry to say this, but it was pretty obvious that Silva took his hands, wiped down his face and rubbed his chest and arms. Something to remember if Silva easily, and repeatedly, slips out of Leites' grasp.
Now if I'm honest, I hardly doubt SIlva was doing it to gain an upperhand on Leites, but it's disappointing nonetheless