Agreed. My TG pole can occasionally feel slippery, but a quick cleaning with either Windex or rubbing alcohol fixes it.
The right cleaning product depends on why the pole is slippery (from oil or moisture). I use Windex to remove body oils or lotion, and alcohol to dry up sweat. Once it's cleaned, I really don't have any grip issues. Of course I need to get stronger, but that's blamed on my muscles, not my skin. 🙂