First off reread my post I'm talking about a very specific type of sweat.I put my clothes in washer on warmest setting clothes will accept (cold to warm) put in laundry detergent wait, put in dryer and fold. They don't smell horrible but not as fresh as say my cotton shirts. I don't get the idea of buying used clothing. Clothes are made so cheaply these days that most will last two to three years. Plus the cost of buying new clothes can be low if you know where to look and shop around.