Bio-hazard ....
Mold and Mildew, if you are the least bit sensitive to it, can be an extreme health hazard - especially if you disturb it and release the spores in to the air. Cleaning mold mildew should be done 'wet' to prevent the release of the spores and inspiration into your respiratory tract. The Center for Disease Control CDC has lots of good info on the protection needed and which chemicals are 'best'. If you live anywhere near 'farming country', go to a farm supply and get some liquid caustic soap/detergent, spray it on the mold/'mildew' and allow it to liquify/dissolve the mold/mildew cells. The caustic will dissolve the cells, chlorine solutions only kill it and leaves the dead cells available as nutrient sources for subsequent infections by other species of mold/mildew. Be VERY careful with caustics as they will dissolve you skin/tissues and these will be be VERY slow to heal. "Boat Soaps" that contain sodium silicate are good, so is a solution of TriSodiiumPhosphate (TSP) which is available in hardware and paint stores. To prevent subsequent mold infections, spray on the caustic detergent and let it dry into the surface .... this will equate to the old fashioned 'whitewashing' that was used to prevent mold growth. Do NOT 'dry' clean mold or mildew.