Fill a clean spray bottle with cool water. Mist the surface mildew with the water to prevent spores from being released into the air during the cleaning process.
Wipe the mildew off the indoor furniture with a clean cloth.
Add 1/2 cup of a mild laundry detergent to a bucket filled with 1 gallon of water.
Submerge a cloth in the mixture. Clean the mildew and surrounding areas off of the indoor furniture.
Combine 1/4 tsp. of bleach with 1 cup of water. Submerge a sponge in the bleach-water mixture. Wring the sponge to remove the excess liquid.
Scrub the indoor furniture gently with the sponge. Pat the indoor furniture with a towel to dry the furniture.