When mold is disrupted by cleaning, it releases tiny seeds (spores) that disperse into the air. After cleaning, the mold may be visibly removed but the spores are still present. If moisture is present from a water leak or elevated humidity, the mold spores will grow into new mold colonies. As a result, each cleaning spreads the mold problem causing regrowth. The key is removing the moisture. Properly removing the mold spores through filtration and treatment will prevent the mold from reoccurring.