SD Realtor is right on the money. Mold spores are everywhere. It’s likely impossible to remove them entirely from a living space.
But in order for mold spores to turn into mold, 3 things are required. Moisture, organic material and darkness. (For most common molds found here, warmer temperatures are also necessary.)
Eliminate the source of moisture and you have eliminated the biggest part of the problem. Once the source is eliminated, the target needs to be well ventilated for all remaining moisture to evaporate. Once that is done, the mold will die. Surface spots may remain, but it will just be dead dirt and inactive spores.
Surface areas can be easily treated with chlorine bleach (1 cup of bleach/gallon of water) which will kill all surface mold. Unless the infestation is serious, this should suffice. Big bucks professional mold remediation is rarely essential.
