[header] How to remove mildew from sheetrock [title] Remove the source of moisture which is supporting the mildew before trying to remove the mildew. [step] If it is a wall or roof leak, patch or repair it. If it is simply condensation, like moisture in a bathroom or shower, you may need a ventilation to remove humidity from the room. 
[title] Prepare a solution of one cup chlorine bleach with water to make one gallon. [title] Pour your solution in a spray bottle.