FIRST: Professional Mold Sampling Have an environmental professional, an engineer, an industrial hygienist, or an indoor air quality specialist with proper credentials, equipment, and experience in doing mold sampling to come in, sample, and find out what kind of mold you have and at what levels. SECOND: Diffuse the Thieves Oil Blend After Sampling is completed, the next step is to diffuse the Thieves Oil Blend continuously (non-stop) for a minimum of 24 hours in the room or rooms where you have mold. Determining how long to diffuse is related to how serious the mold infestation is, and is further explained in the FAQ on this site, as well as in the DVD: Toxic Mold - A Breakthrough Discovery, also available on this site. The recommended cold air diffuser is very easy to set up and clean. Anyone can do it. No special skills or training are required. Using the diffuser is demonstrated on the DVD and instructions also come with the unit. THIRD: Clean with the Thieves Household Cleaner After sampling and diffusing have been completed, then clean areas with visible mold using the Thieves Household Cleaner (it contains the Thieves oil blend). Use appropriate protective equipment.