Whether the damage occurred during a flood, or if you're suffering through a humid summer, your leather coat provides the perfect environment for mold to thrive, according to the University of Florida Extension. Aside from the odor and damage, mold is also an allergen that will lead to coughing, wheezing and sneezing in those susceptible. Leather is a fragile, porous material that must be cleaned correctly to completely eliminate the mold without causing damage.
Remove the dried mold spores from the coat with a leather brush. Slip on goggles and a mask before lightly working the leather brush, which is available through leather product retailers, over the inside and outside of the coat. Brush the coat outdoors to avoid spreading the mold spores.
Slip on a pair of rubber gloves and keep your mask and goggles on. Create a mixture of 1 part denatured alcohol and 1 part water.
Dampen a rag with the mixture and wipe down the inside and outside of the leather coat. The University of Florida Extension recommends testing the diluted denatured alcohol on an inconspicuous area of the coat to ensure no damage occurs.
Hang the leather jacket outside to dry and air out for at least eight hours. Examine the coat for any lingering odor or remaining signs of mold. If the mold persists, spot clean with a dime-sized amount of saddle soap. Pour the saddle soap onto a damp rag and work it into the remaining mold spots. Wipe the saddle soap away immediately with a separate damp rag.
Allow the leather coat to dry completely before storing in a cool, dry and well-ventilated area.