Mold help built around the real cause: moisture
Mold cleanup is more durable when the water or moisture issue is addressed as part of the job. EPA guidance says moisture control is the key to mold control and notes that mold is likely to return if the water problem is not corrected.
When professional help may be worth considering
EPA guidance says many small mold areas under about 10 square feet can often be handled by a homeowner following proper cleanup guidance. Larger areas, extensive water damage, contaminated water, suspected HVAC contamination, hidden mold, or a situation you are not comfortable handling can justify professional help.