I've used vanilla extract as a cover scent before for whitetails. I stood in some bushes that were right on the trail and had deer walk right past me. Eventually a buck came by and stood about 2 feet away....I couldn't take it any longer and touched him with the barrel and then he flipped out and ran off. I only used it for the real close hunting when I crawl under logs and trees above trails. I would get the big bottles of vanilla and put in a spray bottle. Then saturate my clothes and let them dry. The morning I would go out, I'd spray them again.