I use unscented soap and scent killer sprays. In my opinion cover scents are a waste of time. You can't cover one scent with another. Deer can pick out many different scents at the same time and interpret what they are. Each scent has different molecules that they can pick out. If they didn't have this ability then they wouldn't be able to pick out the faint smell of another deer or predator that had walked across a field. Just think how strong the smell of the dirt and corn stalks and weeds are compared to the scent left by the deer or predator. The stronger smell can't cover them up. We don't have this ability so have a hard time believing they as well as other animals can do this. Dogs are used to smell out some cancers, drugs hidden in all kinds of cover scent, they are used to find leaks in underground pipes as deep as twenty feet deep, drowning victims in rivers and lakes and many other amazing things. Deer may not have quite the smelling ability of dogs but I would say they are not too far behind them. We just find it much easier to study dogs so we know more about them.