I'll bet more deer have spotted more hunters in low light conditions due to the ultra violet spectrum than in braod daylight. Washing clothes in non-scented detergent with non-brighteners helps and I do believe in the UV wash and spray.
Maybe. But I'd bet the back forty that most, if not all hunters are busted by movement as oposed to UV signatures. Might sound like BS, but I've actually haddeer come under my stand, stare straight up at me, and look. When I was sitting, motionless, they just moved on. Sometimes after a few minutes, sometimes up to several minutes. The times I've been standing, I'd swear they saw my eyes blink as we made eye contact. Maybe I swayed a little. Whatever the reason, they picked up movement, darted 20 or 30 yards away, then played the head bob game trying to figure out what the heck I was. Then went about the business again as if I was never there. Every now and then though, they'd dart a look back at me. Take it for what it's worth. Maybe they were stupid deer. Maybe they were immature deer. Can't say. But if this UV signature thing was such an issue, why wouldn't they bolt for cover when they saw "Preditor" in a tree?As Arnold said, "He didn't see me".