Picking out a deodorant that will fight sweat and odor can be hard work. Barrie Drewitt happens to a be a professional underarm sniffer, which means his job is, quite literally, the pits. It involves researching and testing different body odors, and seeing which products work to mask them. It goes without saying, Drewitt knows a thing or two about making sure your pits don’t stink. He says different deodorants work differently on different people. If you’ve ever used your spouse's deodorant and found yourself sweating through it before breakfast time, you’ve likely learned this the hard way. We sweat differently because bacteria grows differently on different parts of our bodies. The best deodorant comes down to personal preference and how it works on your body. There’s no general rule as to which brand or formulation reigns supreme. Drewitt also says that clean armpits are the best armpits. Swiping some deodorant on a set of armpits that are already sweaty and smelly isn’t going to do you much good. Once you’re clean, apply deodorant the right way. Coating your armpits with deodorant might not be rocket science, but there’s actually a right way to do it. You want to cover the entire area, and give your armpit a nice coating of product so that it can do its job correctly. Finally, swipe throughout the day. Even though a product may have a 24-hour claim, re-applying it throughout the day is a safeguard that will never leave you wondering.