How to increase friction between cloth and cloth colliders to its maximum...

Hello (awesome) PhysX gurus!

Is it possible to increase the friction between a cloth and its primitive colliders? (e.g. spheres)

Even by applying materials to cloth and colliders at maximum friction, maximum cloth friction looks like a teflon ball rubbing against the cloth! I need to make it much stiffer (like a ball coated with sanding paper rubbing against the cloth!)