The most effective solution for killing mold is a mixture of white vinegar and baking soda. White vinegar, being a natural disinfectant, can help in breaking down mold structures, while baking soda not only kills mold but also absorbs moisture, preventing future mold growth. When using vinegar, spray it undiluted onto the moldy surface, let it sit for an hour, then wipe away or scrub if necessary.  Afterward, you can apply a baking soda solution (a teaspoon of baking soda dissolved in water) to further clean and prevent mold. However, for larger mold infestations or mold that exists within walls or HVAC systems, it’s recommended to seek the expertise of professional mold remediation services. Their comprehensive approach ensures that all mold, including microscopic spores, is addressed, ensuring long-term indoor air quality and safety.