But what the deer do notice and spook because of it is the UV light that radates from you clothes due to the detergent in your washing machine soap. They notice the light that is coming off of you and are catious becuase they are not used to seeing that. A good way to check the UV light that is coming off your clothes is to stand undernth those blue bug zappers.
I' m basing what I' m talking about on experience in the woods not what is in a book. It had nothing to do with UV light (funny how most of those studies are done by companies that sell UV blocker that' s another thread ) . I have has a deer looking up at me when I moved my eyes(only my eyes) to see what else was coming in the deer got really spooky and stomped it' s foot. So I squinted and then closed my eyes, when I reopened my eyes the deer had started feeding. In the 28 years i' ve been hunting I' ve had this type of thing happen more then a few times. One of the deer I shot off the ground was ready to bolt until I squinted for about 4 minutes. He relaxed and I ate his backstraps in some olive oil and garlic the next day.
As far as the detergent giving off UV' s explain this one. I was using A&H with brightners shot 5 deer off the ground (no blind) with a bow 18 yards max. I have had deer come through when it was just getting light and never noticed I' m there. I' m almost 6 ft tall and 260 pounds I should have been as visible as a lighted sign on the side of the highway.Or the moon suddenly moved closer to the earth.