Start by brushing your furniture (please don't use your regular care and maintenance:
How To Clean Mildew Off Cloth Furniture. To clean mildew, or other stubborn stains: The following are the steps of a popular homemade method to remove mildew from fabric
Shine Your Light: Cleaning & Sealing Outdoor Teak Furniture from 4.bp.blogspot.com
Cleaning mold and mildew from leather furniture will release spores and other particles into the air, so it's best to take furniture outside on a dry, sunny day before cleaning it. For mildew on fabric, vinegar is the perfect bleach alternative. Wipe area with a damp cloth.
If possible, clean this mildew as soon as you spot it.
Use a dry, clean cloth to remove as much mildew as possible from your leather item. Help how can i clean this off without damaging the wood? To remove mildew from wood cabinets, paneling, or furniture, vacuum the loose spores with the soft brush attachment. Some warm water and soap should do the trick.