How to Clean Leather Belt With Mold 
Black mold
If your leather belt has developed black mold, you can use a cleaning product specifically made for leather. This product works by dissolving the mold, but you should also make sure to follow the manufacturer’s directions. You should apply the solution using a soft cloth, and then allow it to dry. If the mold doesn’t go away with the cleaning solution, you can also apply vinegar to the moldy area.
Mildew
If you are looking for a quick and simple way to clean your leather belt, you can use a combination of white vinegar and baking soda. The vinegar is a good cleaning agent for leather and it contains strong antifungal properties. Lemon juice also contains mild bleaching properties. It is important to use the proper products and pay attention to detail, though, to ensure that you do not damage the leather.
Soap
A good quality leather belt can last for several years without needing much maintenance, but if you notice visible dirt, water stains, sweat stains, or oil stains, it’s time to clean it. You’ll need a cloth, a cup of lukewarm water, and a mild leather soap or saddle soap. Microfiber cloths are ideal for this task because they won’t cause lint and won’t harm your belt.
Baking soda
If you want to get rid of odors from your leather belt, you can use baking soda to clean it. Just make a paste by mixing one teaspoon of baking soda with three teaspoons of water. Add more water if necessary for a less-abrasive paste. Then, dip a cloth or brush into the paste and scrub the belt buckle. Pay special attention to the areas with dirt. Then, rinse it off with warm water.
Alcohol
If you have a leather belt and it has mold, you can use alcohol to remove it. Alcohol is an effective cleaning agent for leather and suede. However, it should be used with caution because it can cause damage and shrinkage. Fortunately, there are several alternatives that do not cause damage to leather.
Cleaning leather with saddle soap
Saddle soap is a great solution for cleaning your leather belt. It’s a natural cleaner and contains no chemicals. Use it on a damp cloth to clean your belt.
Removing mildew from leather
There are many effective methods to remove mildew from leather. A thorough cleaning process will help to remove any visible stains. However, you should use gentleness to avoid damaging the material. You should also use a leather moisturizer to prevent future deterioration. The process is simple and safe.
