Persistent sweat smell in T-shirts - vinegar cleaner helps
In a ten-liter bucket, add hot water and 4-5 caps of vinegar cleaner and soak the shirts for half a day (with colored shirts, the color starts to fade slightly - but usually does nothing). Then wash the T-shirts as normal at 40 degrees with liquid detergent and possibly fabric softener. Smell is completely gone, and does not come back for the time being with the carrying. You can also try it with lots of gall soap, but the bile soap smell can stay there, otherwise it will work.
