Some of the off the shelf products that you can use for mold and mildew:
1. Bleach. (sodium hypochlorite) Household bleach is 5.25% as sold in the stores. You can use it straight or cut it half and half with water. As you cut it, it will penetrate better. But is it mildly corrosive and will assault a sensitive nose. Will bleach the color out of any fabric and kill plants if saturated with a bleach solution.
2. Hydogen Peroxide. As sold in the stores, it is a 3% solution and can be sprayed on with a spray bottle. Not as effective as bleach initially, but it does work, albeit more slowly. A very very mild oxidizer. Most non chlorine bleaches are made with hydrogen peroxide and can be used to kill light mold and mildew.
3. Consan Triple Action 20. A combination quaternary disinfectant/mildewcide that is very effective on any mold and mildew. Mix with water according to directions. Key is to keep the side WET for 10 minutes. It has a 99.999% efficacy if label instructions are followed. Faint chemical smell. Very similar chemical to Lysol. Available at big box stores and plant houses.
4. Swimming Pool Algaecide. Another quaternary disinfectant/algecide/mildewcide in a 10% solution with water. Efficacy similar to Triple Action 20 as the active is essentially similar. Still need a 10 minute wet time.
All of the above recommendations are predicated on removing all the mold and mildew you can using mechanical means (brush washing, scrubbing, power washing, etc). These chemicals are not very good penetrants and requires you to remove as much of the mold and mildew as possible so the chemicals can be effective on the residue. If you have a heavy mold and spray any of the above on them, it will only kill the surface layer....it will come back almost immediately. So wash the area very well and only use the chemicals on the light residue remaining. Good luck.