My daughter plays high school volleyball, and after her last game she left her sneakers, knee pads, and foot brace in her gym bag, zipped it closed, and let it sit for two months. You can image the odor that greeted me when I finally opened up that bag! I put everything in the washing machine with some Thieves Household Cleaner. I then took two capfuls of Thieves cleaner, put it in a plastic tub and immersed everything for four hours. When I took everything out, not only was the locker room smell completely gone, but everything actually smelled good as well!