I didn't, until today.
I was logging in this morning when I came across an article on here about UV, and how deer see it so well. The article mentioned putting hunting clothes under a UV light and checking it out.
I had already washed all my clothes in a soap designed to remove scent, but it coincidentally had a UV blocker in it. I looked around for some clothes that didn't make the hunting clothes load, and found a face mask.
I just happen to have a pretty decent UV light so I turned it on in my hunting room and almost fell over! Here on my bench is 4 different things I may just end up in the bush with.. The hat on theleft is a Bass Pro hat with a built in screen mask, pretty dark outside of the Bass Pro logo! Beside it is my face mask, it is the same company/material as all my hunting clothes! It is the one that didn't make it to the UV killer soap, the Blazers on my arrow are just screaming bright! (I will have to find a way to cover those..), the hat on the right is one that was in the UV killer, as it should be.
This room is pitch black, the ambient light you see is being generated by stuff glowing, like my arrows and white paper. My UV light is a good one, it gives off no visible light.
I went outside and brought all my hunting clothes into this dark room and ran each piece past the light, there is no glow on any of it, phew..
I can't say for sure if deer see that "glowing blue" so many people claim, but I do know now that it really does exist!