It's a lot easier to just "swipe" to the next page than to actually try and turn it by the corner. My hands are usually dry (but not in the "ashy" sense) and it's hard to do the swiping motion without any sort of grip.
But most of the time I'll have an eraser on hand that I can use that to turn the page (retractable ones work best). }: )
I don't, but at my job they have these rubber fingertip things that do the same thing without saliva
We didn't have those where I used to work in accounting, but what I did was I wrapped a bunch of rubber bands around the tip of a pencil and used that instead of getting my saliva involved. I don't really care about that practice, I just don't prefer to do it.