Lens Fungus Cleaning
Try these following steps:
Soak the camera lens and the lens element in a solution of hydrogen peroxide or bleach for approximately an hour to clean the lens. This will help loosen any fungus and dirt. The hydrogen peroxide will also destroy any fungus that is growing in the lens case.
Remove the lens from the solution; allow it to dry. Use a soft, dry cloth to rub all around the edges to remove any dirt and fingerprints.
Expose the camera to direct sunlight. Place your camera in an area that will receive a lot of sunshine. This will only kill the fungus on the outside of the camera lens.