How to Soften a Leather Belt: 3 Effective Methods Using Rubbing Alcohol, Natural Oils, and Leather Treatment Products. This video describes three methods for softening a leather belt. The first method involves using rubbing alcohol and petroleum jelly. The rubbing alcohol is used to clean the leather and open up the pores, while the petroleum jelly is applied to the belt to soften it. The second method involves using natural oils, such as coconut oil, jojoba oil, or almond oil, to soften the leather. The oil is rubbed into the leather, and the belt is left to dry. The third method involves using leather treatment products, which can be purchased at stores that sell saddles and bridles. These products are designed to soften, clean, and polish leather. The video provides tips and warnings for each method, such as avoiding the use of alcohol on leather couches and chairs, and letting a new belt break in on its own before attempting to soften it.