Next time you are in the woods scouting, pick up some fallen acorns & pine needles from the ground. Put the acorns & pine needles in water and boil them until they are soft(ten-fifteen minutes). Smash up the acorns and then boil them again. When the water turns real dark colored, strain the mixture and put the liquid away until your next hunt. Put the mixture in a spray bottle for easy application. You now have an effective and all natural cover scent.

Or use what ever is in your area.