One of the first shooting lessons I took was from Rod Jenkins, who is a big proponent of slick grip. He feels that the the bow hand should be placed on the bow handle where neither the bow hand nor the bow handle can slide, regardless of the amount of sweat there may be on your hand and the bow handle. This has to be a place where all the force is directed on something solid, like pushing against a wall, and is not depending on friction to hold it there, like the web between thumb and forefinger, and the meaty part of your hand on the thumb side of your lifeline. On the bow side, the surface has to be either flat or rounded in such a way that no significant forces are trying to push your hand down an angled slope. Rod was merciless about shaping his grips to achieve this, and I have become the same way.
I have a bow made by a well known bowyer where the force of drawing the bow was trying to make my hand slip off the bow handle to the left. I lived with this for years, thinking that he knew more than I did and I was going to ruin the bow. Finally I knew what I wanted, and didn’t want to live with the handle the way it was anymore. So I sanded it so there is no inclination for the part of the bow handle that contacts my hand to slip sideways, and I am much happier with that bow. It might make it harder to sell, but between now and then I will enjoy it more.
The secret is to know why you’re sanding something before you start in on it, and then just do it little by little until you get what you want.