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Not anymore really, I wash my hunting clothing in scent free detergent just because it is available, I use a bland body/hair wash before hunt, same for deodorant, simple stuff just because it is easy enough to do. None of that means a thing if a coyote gets downwind, so it is probably a waste of time. But I do the simple stuff and at least I smell better to me! 
Years back I bought into all that stuff and used it all exactly as the book tells you. Hunting clothes were stored in a scent free duffle after being washed in the scent free detergent, I showered in scent free soap and shampoo, I even spritzed the interior of my truck with scent eliminator, a final spray down with scent eliminator before leaving the truck, cover scent at the stand and around the decoy. I found out that none of that makes any difference if a coyote is downwind - he will know you are there. I started thinking about those police canines at work and after some research on canine noses it became more clear how important the wind is in coyote calling.
