Mold or mildew?
Mildew is actually just a specific type of mold. It's a thin, white fungus that coats moist surfaces, especially flat surfaces, such as walls and siding.
Mold and mildew removal products
The product that you choose to remove the mold/mildew depends on the surface on which it is growing. Check out The 7 Best Mold Removers of 2020 that will help you select the ideal remover for your project. Looking for a broadly effective mold remover? Check out the RMR-141 RTU Mold Killer and Disinfectant. It stops the growth of mold and mildew, while eliminating odors. If you're trying to say goodbye to mold/mildew on siding, consider a solution of 70% water, 30% vinegar and some scrubbing.
How to avoid mold and mildew
Avoiding mold and mildew is all about controlling the moisture level. It thrives in hot, humid areas, so strive to keep your home at a cooler temperature level and mitigate humidity by running a dehumidifier. Painting in such conditions also encourages a lack of mold and mildew.
Also, consider painting with paint that resists these fungi: 5 Best Mold and Mildew Resistant Paints.