There are a few things you can do to soften leather belt. One is to soak the belt in a bucket of warm water and Epsom salt. Leave it in for several hours, or overnight. The Epsom salt will help break down the protein in the leather, making it more pliable. Another option is to heat the belt up in a dryer on low heat. Again, leave it in for a few hours or overnight. The heat will help soften the leather.
If you don’t want to soften the belt yourself, you can always go to a leather goods store and ask them to do it for you. They will also be able to recommend other ways to care for your belt, such as conditioning it with a light wax or oil to keep it looking good for longer.
Leather belt can be softened by soaking it in warm water and washing it with a mild soap. Make sure to rinse it well before drying. You can also try using a Conditioner for Leather.
If the belt is extremely stiff and difficult to remove, you may need to soak it in a solution of one part vinegar to nine parts water. Soak the belt in the solution for a few hours, then rinse it well and dry it.