Wash your jeans only as needed, such as after sweating through the denim or accidentally falling into a mud puddle. Remove small spots and stains with a wet washcloth, and eliminate odors by leaving the jeans in the freezer overnight.
Fill your bathtub a quarter of the way full with warm water. Add a cup of vinegar to the water along with two tablespoons of mild laundry detergent.
Turn your jeans inside out and place them in the water. Allow them to soak for five to 10 minutes, then agitate gently for five more minutes. Empty the bathtub.
Rinse the jeans thoroughly in a bath of cold water. Hang them over a folded towel from the shower rack to drip dry. Avoid drying your jeans in a dryer on a high setting, as this will shrink and fade the denim over time.