Do you freeze your jeans? ... Levi Strauss advises freezing your jeans to kill the germs that make them smelly, thereby saving the water you'd ...How to Wash Jeans. Two Methods:Cleaning ... You can use a mild fabric softener if you want your jeans a bit softer. Image titled Wash ... Fold your jeans once at the knee level and hang them on a clothes hanger or rack to dry. Over-folding ..