Each time I add a layer of oil after bringing the cast Iron slowly up to temp which is Approx 350 to 360 degrees. You are working each layer at that hot temperature. Thin layers and immediately wipe it off and get it right into the oven again. When I say wipe it off, I mean like buff each coating off. The object is micro layers. As many as you want. I go three. Then oven off let it cool down slowly. Each time you use it wipe it clean and I mean clean. Use water if you can so as to loosen the sticky bits. Slowly heat your pan or what you are using on a burner just long enough to dry it completely.
There is no excuse to have a sticky oily gooey cooking vessel whatsoever. None, zilch, no way. Same thing for rust. No excuse. Your end goal is a thin carbon layer.