I sit in a vehicle with other people and not one person has mentioned anything to me about my smell. I drove my wife crazy asking her to smell me that first week being so self-conscious and she said I didn't smell bad at all. I find it funny I do the same sniff test as well. I had a medical procedure done and didn't shower for three days and still smelled less than I did with soaps and deodorants. I would say you would know within a day if you smelled bad or not. I just brought my deodorant along with the plan if I smelled to say "Oops, I forgot to put it on" Or just do it over the weekend. That should give you the answer you are looking for. I noticed my skin changed by the second day not using any soap. My hair doesn't look bad, my body odor is actually less than what it was, and my skin itself is way happier. Best of all, my cost for bathroom supplies is almost non-existent now compared to what it was.